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The Literature Review

Primary and secondary sources, the literature review: primary and secondary sources.

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• Primary vs secondary sources: The differences explained 

Can something be both a primary and secondary source?

Research for your literature review can be categorised as either primary or secondary in nature. The simplest definition of primary sources is either original information (such as survey data) or a first person account of an event (such as an interview transcript). Whereas secondary sources are any publshed or unpublished works that describe, summarise, analyse, evaluate, interpret or review primary source materials. Secondary sources can incorporate primary sources to support their arguments.

Ideally, good research should use a combination of both primary and secondary sources. For example, if a researcher were to investigate the introduction of a law and the impacts it had on a community, he/she might look at the transcripts of the parliamentary debates as well as the parliamentary commentary and news reporting surrounding the laws at the time. 

Examples of primary and secondary sources

Primary vs secondary sources: The differences explained

Finding primary sources

• VU Special Collections  - The Special Collections at Victoria University Library are a valuable research resource. The Collections have strong threads of radical literature, particularly Australian Communist literature, much of which is rare or unique. Women and urban planning also feature across the Collections. There are collections that give you a picture of the people who donated them like Ray Verrills, John McLaren, Sir Zelman Cowen, and Ruth & Maurie Crow. Other collections focus on Australia's neighbours – PNG and Timor-Leste.
• POLICY - Sharing the latest in policy knowledge and evidence, this database supports enhanced learning, collaboration and contribution.
• Indigenous Australia  -  The Indigenous Australia database represents the collections of the Aboriginal and Torres Strait Islander Commission Library.
• Australian Heritage Bibliography - Aboriginal and Torres Strait Islander Subset (AHB-ATSIS)  - AHB is a bibliographic database that indexes and abstracts articles from published and unpublished material on Australia's natural and cultural environment. The AHB-ATSIS subset contains records that specifically relate to the Aboriginal and Torres Strait Islander peoples.include journal articles, unpublished reports, books, videos and conference proceedings from many different sources around Australia. Emphasis is placed on reports written or commissioned by government and non-government heritage agencies throughout the country.
• ATSIhealth  - The Aboriginal and Torres Strait Islander Health Bibliography (ATSIhealth), compiled by Neil Thomson and Natalie Weissofner at the School of Indigenous Australian Studies, Kurongkurl Katitjin, Edith Cowan University, is a bibliographic database that indexes published and unpublished material on Australian Indigenous health. Source documents include theses, unpublished articles, government reports, conference papers, abstracts, book chapters, books, discussion and working papers, and statistical documents. 
• National Archive of Australia  - The National Archives of Australia holds the memory of our nation and keeps vital Australian Government records safe. 
• National Library of Australia: Manuscripts  - Manuscripts collection that is wide ranging and provides rich evidence of the lives and activities of Australians who have shaped our society.
• National Library of Australia: Printed ephemera  - The National Library has been selectively collecting Australian printed ephemera since the early 1960s as a record of Australian life and social customs, popular culture, national events, and issues of national concern.
• National Library of Australia: Oral history and folklore - The Library’s Oral History and Folklore Collection dates back to the 1950’s and includes a rich and diverse collection of interviews and recordings with Australians from all walks of life.
• Historic Hansard - Commonwealth of Australia parliamentary debates presented in an easy-to-read format for historians and other lovers of political speech.
• The Old Bailey Online - A fully searchable edition of the largest body of texts detailing the lives of non-elite people ever published, containing 197,745 criminal trials held at London's central criminal court.

Whether or not a source can be considered both primary and  secondary, depends on the context. In some instances, material may act as a secondary source for one research area, and as a primary source for another. For example, Niccolò Machiavelli’s The Prince , published in 1513, is an important secondary source for any study of the various Renaissance princes in the Medici family; but the same book is also a primary source for the political thought that was characteristic of the sixteenth century because it reflects the attitudes of a person living in the 1500s.

Source: Craver, 1999, as cited in University of South Australia Library. (2021, Oct 6).  Can something be a primary and secondary source?.  University of South Australia Library. https://guides.library.unisa.edu.au/historycultural/sourcetypes

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• Subject Guides

Literature Review Basics

• Primary & Secondary Sources
• Literature Review Introduction
• Writing Literature Reviews
• Tutorials & Samples

The Literature

The Literature refers to the collection of scholarly writings on a topic. This includes peer-reviewed articles, books, dissertations and conference papers.

• When reviewing the literature, be sure to include major works as well as studies that respond to major works. You will want to focus on primary sources, though secondary sources can be valuable as well.

Primary Sources

The term primary source is used broadly to embody all sources that are original. P rimary sources provide first-hand information that is closest to the object of study. Primary sources vary by discipline.

• In the natural and social sciences, original reports of research found in academic journals detailing the methodology used in the research, in-depth descriptions, and discussions of the findings are considered primary sources of information.
• Other common examples of primary sources include speeches, letters, diaries, autobiographies, interviews, official reports, court records, artifacts, photographs, and drawings.  

Galvan, J. L. (2013). Writing literature reviews: A guide for students of the social and behavioral sciences . Glendale, CA: Pyrczak.

Secondary Sources

A secondary source is a source that provides non-original or secondhand data or information. 

• Secondary sources are written about primary sources.
• Research summaries reported in textbooks, magazines, and newspapers are considered secondary sources. They typically provide global descriptions of results with few details on the methodology. Other examples of secondary sources include biographies and critical studies of an author's work.

Secondary Source. (2005). In W. Paul Vogt (Ed.), Dictionary of Statistics & Methodology. (3 rd ed., p. 291). Thousand Oaks, CA: SAGE Publications, Inc.

Weidenborner, S., & Caruso, D. (1997). Writing research papers: A guide to the process . New York: St. Martin's Press.

More Examples of Primary and Secondary Sources

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• Primary vs. Secondary Sources | Difference & Examples

Primary vs. Secondary Sources | Difference & Examples

Published on 4 September 2022 by Raimo Streefkerk . Revised on 15 May 2023.

When you do research, you have to gather information and evidence from a variety of sources.

Primary sources provide raw information and first-hand evidence. Examples include interview transcripts, statistical data, and works of art. A primary source gives you direct access to the subject of your research.

Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books . A secondary source describes, interprets, or synthesises primary sources.

Primary sources are more credible as evidence, but good research uses both primary and secondary sources.

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Table of contents

What is a primary source, what is a secondary source, primary and secondary source examples, how to tell if a source is primary or secondary, primary vs secondary sources: which is better, frequently asked questions about primary and secondary sources.

A primary source is anything that gives you direct evidence about the people, events, or phenomena that you are researching. Primary sources will usually be the main objects of your analysis.

If you are researching the past, you cannot directly access it yourself, so you need primary sources that were produced at the time by participants or witnesses (e.g. letters, photographs, newspapers ).

If you are researching something current, your primary sources can either be qualitative or quantitative data that you collect yourself (e.g. through interviews, surveys, experiments) or sources produced by people directly involved in the topic (e.g. official documents or media texts).

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A secondary source is anything that describes, interprets, evaluates, or analyses information from primary sources. Common examples include:

• Books , articles and documentaries that synthesise information on a topic
• Synopses and descriptions of artistic works
• Encyclopaedias and textbooks that summarize information and ideas
• Reviews and essays that evaluate or interpret something

When you cite a secondary source, it’s usually not to analyse it directly. Instead, you’ll probably test its arguments against new evidence or use its ideas to help formulate your own.

Examples of sources that can be primary or secondary

A secondary source can become a primary source depending on your research question . If the person, context, or technique that produced the source is the main focus of your research, it becomes a primary source.

To determine if something can be used as a primary or secondary source in your research, there are some simple questions you can ask yourself:

• Does this source come from someone directly involved in the events I’m studying (primary) or from another researcher (secondary)?
• Am I interested in analysing the source itself (primary) or only using it for background information (secondary)?
• Does the source provide original information (primary) or does it comment upon information from other sources (secondary)?

Most research uses both primary and secondary sources. They complement each other to help you build a convincing argument. Primary sources are more credible as evidence, but secondary sources show how your work relates to existing research.

What do you use primary sources for?

Primary sources are the foundation of original research. They allow you to:

• Make new discoveries
• Provide credible evidence for your arguments
• Give authoritative information about your topic

If you don’t use any primary sources, your research may be considered unoriginal or unreliable.

What do you use secondary sources for?

Secondary sources are good for gaining a full overview of your topic and understanding how other researchers have approached it. They often synthesise a large number of primary sources that would be difficult and time-consuming to gather by yourself. They allow you to:

• Gain background information on the topic
• Support or contrast your arguments with other researchers’ ideas
• Gather information from primary sources that you can’t access directly (e.g. private letters or physical documents located elsewhere)

When you conduct a literature review , you can consult secondary sources to gain a thorough overview of your topic. If you want to mention a paper or study that you find cited in a secondary source, seek out the original source and cite it directly.

Remember that all primary and secondary sources must be cited to avoid plagiarism . You can use Scribbr’s free citation generator to do so!

Common examples of primary sources include interview transcripts , photographs, novels, paintings, films, historical documents, and official statistics.

Anything you directly analyze or use as first-hand evidence can be a primary source, including qualitative or quantitative data that you collected yourself.

Common examples of secondary sources include academic books, journal articles , reviews, essays , and textbooks.

Anything that summarizes, evaluates or interprets primary sources can be a secondary source. If a source gives you an overview of background information or presents another researcher’s ideas on your topic, it is probably a secondary source.

To determine if a source is primary or secondary, ask yourself:

• Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
• Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
• Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of sources are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews ). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism .

A fictional movie is usually a primary source. A documentary can be either primary or secondary depending on the context.

If you are directly analysing some aspect of the movie itself – for example, the cinematography, narrative techniques, or social context – the movie is a primary source.

If you use the movie for background information or analysis about your topic – for example, to learn about a historical event or a scientific discovery – the movie is a secondary source.

Whether it’s primary or secondary, always properly cite the movie in the citation style you are using. Learn how to create an MLA movie citation or an APA movie citation .

Articles in newspapers and magazines can be primary or secondary depending on the focus of your research.

In historical studies, old articles are used as primary sources that give direct evidence about the time period. In social and communication studies, articles are used as primary sources to analyse language and social relations (for example, by conducting content analysis or discourse analysis ).

If you are not analysing the article itself, but only using it for background information or facts about your topic, then the article is a secondary source.

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Streefkerk, R. (2023, May 15). Primary vs. Secondary Sources | Difference & Examples. Scribbr. Retrieved 12 August 2024, from https://www.scribbr.co.uk/working-sources/primary-vs-secondary-sources/

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Literature review sources

Sources for literature review can be divided into three categories as illustrated in table below. In your dissertation you will need to use all three categories of literature review sources:

Sources for literature review and examples

Generally, your literature review should integrate a wide range of sources such as:

• Books . Textbooks remain as the most important source to find models and theories related to the research area. Research the most respected authorities in your selected research area and find the latest editions of books authored by them. For example, in the area of marketing the most notable authors include Philip Kotler, Seth Godin, Malcolm Gladwell, Emanuel Rosen and others.
• Magazines . Industry-specific magazines are usually rich in scholarly articles and they can be effective source to learn about the latest trends and developments in the research area. Reading industry magazines can be the most enjoyable part of the literature review, assuming that your selected research area represents an area of your personal and professional interests, which should be the case anyways.
• Newspapers can be referred to as the main source of up-to-date news about the latest events related to the research area. However, the proportion of the use of newspapers in literature review is recommended to be less compared to alternative sources of secondary data such as books and magazines. This is due to the fact that newspaper articles mainly lack depth of analyses and discussions.
• Online articles . You can find online versions of all of the above sources. However, note that the levels of reliability of online articles can be highly compromised depending on the source due to the high levels of ease with which articles can be published online. Opinions offered in a wide range of online discussion blogs cannot be usually used in literature review. Similarly, dissertation assessors are not keen to appreciate references to a wide range of blogs, unless articles in these blogs are authored by respected authorities in the research area.

Your secondary data sources may comprise certain amount of grey literature as well. The term grey literature refers to type of literature produced by government, academics, business and industry in print and electronic formats, which is not controlled by commercial publishers. It is called ‘grey’ because the status of the information in grey literature is not certain. In other words, any publication that has not been peer reviewed for publication is grey literature.

The necessity to use grey literature arises when there is no enough peer reviewed publications are available for the subject of your study.

John Dudovskiy

Evaluating Information

Introduction.

• Primary Sources
• Secondary Sources

Further Reading

Learning objectives.

• Exploring and Evaluating Popular, Trade, and Scholarly Sources
• How to Read a Scholarly Article

This guide is designed to help you:

• Identify the difference between a primary and a secondary source
• Discuss the roles that each type play in academic research

Primary sources are evidence that was created at a time under study. They include printed, manuscript/archival, audio/visual, and born-digital materials. When analyzing a primary source, it’s important to consider who the intended audience might have been. For example, a letter could have been sent to an individual reader; a newspaper article would have been intended for a broader audience. 

• Use primary sources to inform your research about a particular time, place, or individual.
• Primary sources can be found online through research databases, websites like Twitter, and digitized special collections, including many items from the Brown University Library's Special Collections. Search the Brown Digital Repository for digitized special collections material . 
• Upon request, the Library can scan some primary source material that is not already digitized.

Note for research in the sciences: Primary sources in the sciences are forms of documentation of original research. This could be a conference paper, presentation, journal article, lab notebook, dissertation, or patent.

Ask yourself: How could this image be used as evidence to support my research?

Citation:  Boitard, Louis-Philippe, "Hannah Snell the female soldier" (1750). Prints, Drawings and Watercolors from the Anne S.K. Brown Military Collection. Brown Digital Repository. Brown University Library. https://repository.library.brown.edu/studio/item/bdr:227249/

Secondary sources are scholarly or other analyses of a primary source, created by a person not directly involved with the time period or event being studied.

• Use secondary sources to recreate, analyze, critique, and/or report on a particular topic based on review of a single or a collection of primary sources.
• Secondary sources available online include ebooks and journals. Learn more in the Finding Information tutorial. 
• If a secondary source is unavailable electronically through the Library, you can suggest a purchase.  Once the suggestions is received, we will try to find an electronic copy of the material.

Note  for  research  in the sciences: Secondary  sources in the sciences are publications that comment or analyze original research. This could be a handbook, monograph, public opinion, encyclopedia, or government or public policy.

Based on the research we were doing in the first example, let's look for research that others have done about cross-dressing in history, especially around the time that the etching above was created.

You can  search the Library's catalog (BruKnow) with the keywords   cross dressing 18th century 

Within the results, you see a book titled In the Company of Men: Cross-dressed Women around 1800 .

Krimmer, E. (2004). In the company of men : cross-dressed women around 1800. Detroit, Mich.: Wayne State University Press.

If you click to get more information on the book, you will find useful information to provide context and background for the etching, housed in the Library's Special Collections. 

• Vos, J. and Guzman, Y. (2019). "Understanding my home: the potential for affective impact and cultural competence in primary source literacy," Journal of Western Archives, 10 (1), article 6. Available at: https://digitalcommons.usu.edu/westernarchives/vol10/iss1/6
• Primary and secondary source quiz form the Ithaca College Library: h ttps://library.ithaca.edu/ r101/primary/

This guide was designed to help you:

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Primary and secondary sources: what are they and why do I need them?

What are the main differences between primary and secondary sources?

Why do i need to use both primary and secondary sources in my research, examples of primary and secondary sources, frequently asked questions about primary and secondary sources, related articles.

Primary and secondary sources are the two main types of source materials that you will use for your research project. They are both important and needed for your project. Whether you are going to use more primary or more secondary sources depends on your academic level - undergrad, postgrad, or professional.

Both types of sources have importance and merits of their own, but they are also immensely different. This guide will help you understand the differences. If you want to learn even more about both source types separately, where and how you can access them, and when and how to use them, check out the links below:

➡️  What is a primary source?

➡️  What is a secondary source?

The main difference between primary and secondary sources is that primary sources are contemporary.

Primary sources are original and originated from the event they refer to. They are not reviews, analyses, or critiques of events that occurred in the past. They are first-hand information.

Secondary sources are summaries, critiques, opinions, and analyses. They are written by people who did not witness, or have any direct part to play in the event they are describing. The information they contain is based on primary sources and is the author’s interpretation of the event/subject they are covering.

Using both types of sources adds to the merit of your research. By including references to secondary sources , you are showing that you have truly engaged with your research topic. You are providing extra information and displaying a well-rounded approach to your topic. You are not relying solely on the work of one person, or one institution, for your analysis to be based upon. You are reading broadly and contextually.

Likewise, including primary source references in your research shows that you are also going back to the roots. You are looking at the event or object as it happened, without being able to teleport through time and space. A primary source is vital because it will enable you to make your own judgement on an event or object. Secondary sources are always biased, in one sense or another, so engaging with the primary source yourself allows you to view the topic objectively.

Primary and secondary sources complement each other - looking at both can give you a deeper understanding of each. A primary source can help you to evaluate a secondary source - you will notice aspects of it which the author dismisses, or washes over in their discussion. Likewise, a secondary source can tell you about current trends in research and analysis, while providing you with a broad overview or summary of an extended period of time, or the works of an artist.

We have put together a list of examples of primary and secondary sources by fields of study. It will help you identify the nature of your source.

Primary sources are original and originated from the event they refer to. They are not reviews, analyses, or critiques of events that occurred in the past. They are first-hand information. For a more detailed description of what a primary source is, where you can access them, and why you need to use them, see this article about primary sources .

Secondary sources are summaries, critiques, opinions, and analyses. They are written by people who did not witness, or have any direct part to play in the event they are describing. The information they contain is based on primary sources, and is the author’s interpretation of the event/subject they are covering. See this article about secondary sources for further information.

Some examples of primary sources are: Poems, diaries, letters, paintings, government records, maps, interviews (transcribed or recorded), photographs, newspaper articles, results of experiments, case studies, results of clinical trials, minutes of meetings, and proceedings of conferences

Some examples of secondary sources are: Biographies, histories, reviews, encyclopaedias, literary criticism, discussions of importance, analysis of clinical trials, and reviews of results.

The one main difference between primary and secondary sources is that primary sources are contemporary and secondary sources are not.

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• Knowledge Base
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• Primary vs. Secondary Sources | Difference & Examples

Primary vs. Secondary Sources | Difference & Examples

Published on June 20, 2018 by Raimo Streefkerk . Revised on May 31, 2023.

When you do research, you have to gather information and evidence from a variety of sources.

Primary sources provide raw information and first-hand evidence. Examples include interview transcripts, statistical data, and works of art. Primary research gives you direct access to the subject of your research.

Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books . Thus, secondary research describes, interprets, or synthesizes primary sources.

Primary sources are more credible as evidence, but good research uses both primary and secondary sources.

Table of contents

What is a primary source, what is a secondary source, primary and secondary source examples, how to tell if a source is primary or secondary, primary vs secondary sources: which is better, other interesting articles, frequently asked questions about primary and secondary sources.

A primary source is anything that gives you direct evidence about the people, events, or phenomena that you are researching. Primary sources will usually be the main objects of your analysis.

If you are researching the past, you cannot directly access it yourself, so you need primary sources that were produced at the time by participants or witnesses (e.g. letters, photographs, newspapers ).

If you are researching something current, your primary sources can either be qualitative or quantitative data that you collect yourself (e.g. through interviews , surveys , experiments ) or sources produced by people directly involved in the topic (e.g. official documents or media texts).

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A secondary source is anything that describes, interprets, evaluates, or analyzes information from primary sources. Common examples include:

• Books , articles and documentaries that synthesize information on a topic
• Synopses and descriptions of artistic works
• Encyclopedias and textbooks that summarize information and ideas
• Reviews and essays that evaluate or interpret something

When you cite a secondary source, it’s usually not to analyze it directly. Instead, you’ll probably test its arguments against new evidence or use its ideas to help formulate your own.

Examples of sources that can be primary or secondary

A secondary source can become a primary source depending on your research question . If the person, context, or technique that produced the source is the main focus of your research, it becomes a primary source.

Documentaries

If you are researching the causes of World War II, a recent documentary about the war is a secondary source . But if you are researching the filmmaking techniques used in historical documentaries, the documentary is a primary source .

Reviews and essays

If your paper is about the novels of Toni Morrison, a magazine review of one of her novels is a secondary source . But if your paper is about the critical reception of Toni Morrison’s work, the review is a primary source .

Newspaper articles

If your aim is to analyze the government’s economic policy, a newspaper article about a new policy is a secondary source . But if your aim is to analyze media coverage of economic issues, the newspaper article is a primary source .

To determine if something can be used as a primary or secondary source in your research, there are some simple questions you can ask yourself:

• Does this source come from someone directly involved in the events I’m studying (primary) or from another researcher (secondary)?
• Am I interested in evaluating the source itself (primary) or only using it for background information (secondary)?
• Does the source provide original information (primary) or does it comment upon information from other sources (secondary)?

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Most research uses both primary and secondary sources. They complement each other to help you build a convincing argument. Primary sources are more credible as evidence, but secondary sources show how your work relates to existing research. Tertiary sources are often used in the first, exploratory stage of research.

What do you use primary sources for?

Primary sources are the foundation of original research. They allow you to:

• Make new discoveries
• Provide credible evidence for your arguments
• Give authoritative information about your topic

If you don’t use any primary sources, your research may be considered unoriginal or unreliable.

What do you use secondary sources for?

Secondary sources are good for gaining a full overview of your topic and understanding how other researchers have approached it. They often synthesize a large number of primary sources that would be difficult and time-consuming to gather by yourself. They allow you to:

• Gain background information on the topic
• Support or contrast your arguments with other researchers’ ideas
• Gather information from primary sources that you can’t access directly (e.g. private letters or physical documents located elsewhere)

When you conduct a literature review or meta analysis, you can consult secondary sources to gain a thorough overview of your topic. If you want to mention a paper or study that you find cited in a secondary source, seek out the original source and cite it directly.

Remember that all primary and secondary sources must be cited to avoid plagiarism . You can use Scribbr’s free citation generator to do so!

If you want to know more about ChatGPT, AI tools , citation , and plagiarism , make sure to check out some of our other articles with explanations and examples.

• ChatGPT vs human editor
• ChatGPT citations
• Is ChatGPT trustworthy?
• Using ChatGPT for your studies
• What is ChatGPT?
• Chicago style
• Paraphrasing

 Plagiarism

• Types of plagiarism
• Self-plagiarism
• Avoiding plagiarism
• Academic integrity
• Consequences of plagiarism
• Common knowledge

Common examples of primary sources include interview transcripts , photographs, novels, paintings, films, historical documents, and official statistics.

Anything you directly analyze or use as first-hand evidence can be a primary source, including qualitative or quantitative data that you collected yourself.

Common examples of secondary sources include academic books, journal articles , reviews, essays , and textbooks.

Anything that summarizes, evaluates or interprets primary sources can be a secondary source. If a source gives you an overview of background information or presents another researcher’s ideas on your topic, it is probably a secondary source.

To determine if a source is primary or secondary, ask yourself:

• Was the source created by someone directly involved in the events you’re studying (primary), or by another researcher (secondary)?
• Does the source provide original information (primary), or does it summarize information from other sources (secondary)?
• Are you directly analyzing the source itself (primary), or only using it for background information (secondary)?

Some types of source are nearly always primary: works of art and literature, raw statistical data, official documents and records, and personal communications (e.g. letters, interviews ). If you use one of these in your research, it is probably a primary source.

Primary sources are often considered the most credible in terms of providing evidence for your argument, as they give you direct evidence of what you are researching. However, it’s up to you to ensure the information they provide is reliable and accurate.

Always make sure to properly cite your sources to avoid plagiarism .

A fictional movie is usually a primary source. A documentary can be either primary or secondary depending on the context.

If you are directly analyzing some aspect of the movie itself – for example, the cinematography, narrative techniques, or social context – the movie is a primary source.

If you use the movie for background information or analysis about your topic – for example, to learn about a historical event or a scientific discovery – the movie is a secondary source.

Whether it’s primary or secondary, always properly cite the movie in the citation style you are using. Learn how to create an MLA movie citation or an APA movie citation .

Articles in newspapers and magazines can be primary or secondary depending on the focus of your research.

In historical studies, old articles are used as primary sources that give direct evidence about the time period. In social and communication studies, articles are used as primary sources to analyze language and social relations (for example, by conducting content analysis or discourse analysis ).

If you are not analyzing the article itself, but only using it for background information or facts about your topic, then the article is a secondary source.

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

Streefkerk, R. (2023, May 31). Primary vs. Secondary Sources | Difference & Examples. Scribbr. Retrieved August 12, 2024, from https://www.scribbr.com/working-with-sources/primary-and-secondary-sources/

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How to Write a Literature Review: Primary and Secondary Sources

• Writing a Literature Review in APA Format
• Chicago/Turabian Citation Style
• Primary and Secondary Sources
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Primary versus Secondary Sources

Primary vs. secondary videos.

Primary, Secondary, & Tertiary Sources The content of research papers may come from different types of sources, such as:

• Your own opinion and analysis
• Primary sources
• Secondary sources
• Tertiary sources

It may not be necessary to include each of these types of sources in every paper you write, but your instructor may require you to include them. It is important to understand the characteristics of primary, secondary and tertiary sources–they each serve a different purpose throughout the research process, and can strengthen your assignment, too.

It can be difficult to figure out if a source is considered primary, secondary, or tertiary. We will explain the differences and provide examples of each in this tutorial. If you are still not sure if a source you would like to use is primary, secondary, or tertiary, ask a librarian or teacher.

What is a Primary Source? Primary sources are first-hand, authoritative accounts of an event, topic, or historical time period. They are typically produced at the time of the event by a person who experienced it, but can also be made later on in the form of personal memoirs or oral histories.

Anything that contains original information on a topic is considered a primary source. Usually, primary sources are the object discussed in your paper. For instance, if you are writing an analysis on Upton Sinclair’s The Jungle, the book would be a primary source. But, just because a source is old does not mean it is a primary source.

Some examples of original, first-hand, authoritative accounts include:

• Letters, diaries or journals (Personal thoughts)
• Original photographs
• First-hand newspaper reports
• Speeches, autobiographies
• Creative works like plays, paintings and songs
• Research data and surveys

What is a Secondary Source? Secondary sources interpret or critique primary sources. They often include an analysis of the event that was discussed or featured in the primary source.  They are second-hand accounts that interpret or draw conclusions from one or more primary sources.

Some examples of works that interpret or critique primary sources include:

• Textbooks (May also be considered tertiary)
• Essays or reviews
• Articles that analyze or discuss ideas and events
• Criticisms or commentaries

What is a Tertiary Source? Tertiary sources generally provide an overview or summary of a topic, and may contain both primary and secondary sources. The information is displayed as entirely factual, and does not include analysis or critique.  Tertiary sources can also be collections of primary and secondary sources, such as databases, bibliographies and directories.

Some examples of sources that provide a summary or collection of a topic include:

• Textbooks (May also be considered secondary)
• Bibliographies or abstracts
• Wikipedia articles
• Encyclopedias

Using Primary, secondary and Tertiary Sources in Research Let’s say you are writing a research paper on the Equal Rights Amendment (ERA) of 1972, but you are unfamiliar with it. A good place to gather a general idea or understanding of the ERA would be a tertiary source, such as Wikipedia or the Encyclopedia Britannica. There, you can read a summary of events on its history, key people involved, and legislation.

To find more in-depth analysis on the Equal Rights Amendment, you consult a secondary source: the nonfiction book Why We Lost the ERA by Jane Mansbridge and a newspaper article from the 1970’s that discuss and review the legislation. These provide a more focused analysis of the Equal Rights Amendment that you can include as sources in your paper (make sure you cite them!).  A primary source that could bolster your research would be a government document detailing the ERA legislation that initially passed in Congress, giving a first-hand account of the legislation that went through the House and Senate in 1972.

This video provides a great overview of primary and secondary sources: [ youtube http://www.youtube.com/watch?v= PgfQC4d3pKc &w=420&h=315]

Source:  http://content.easybib.com/students/research-guide/primary-secondary-tertiary-sources/

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Primary Vs Secondary Source – Which to Use?

Published by Owen Ingram at August 21st, 2023 , Revised On August 21, 2023

When researching or exploring a new topic, the distinction between primary and secondary sources is paramount. The relevance, validity and reliability  of the information you gather will heavily depend on the type of source you consult. 

Let’s discuss the difference between primary and secondary sources. 

What is a Primary Source?

Primary source s offer first-hand accounts or direct evidence of the events, objects, people, or works of art they represent. These sources are often created by witnesses or first recorders of these events when they occurred or even later. 

Some examples of primary sources include:

• Original Documents: Diaries, letters, manuscripts, autobiographies, interview transcripts.
• Artefacts: Clothing, tools, works of art, architectural structures.
• Official Records: Census data, marriage certificates, birth certificates.
• Photographs & Audio-Visual Materials: Photographs, films, audio recordings, video recordings.
• Raw Data: Original research data and laboratory notes.
• Oral Histories: Interviews, oral reports, and personal storytelling.
• Contemporary Newspapers, Magazines, or Reports: From the time period in question.

Advantages of Primary Sources

• Authenticity: Primary sourc es provide direct evidence or first-hand account of an event, making them highly authentic.
• Depth and Detail: They offer in-depth insights, providing a more comprehensive understanding of the subject.
• Original Perspective: They reflect the personal perspective of the original author or the direct observer, allowing a closer connection to the events or phenomena.

Limitations of Primary Sources

• Potential Bias: Primary sources may carry the creator’s cognitive bias or explicit bias , which could impact their accuracy.
• Time-Consuming: Analysing and interpreting primary sources can be time-intensive.
• Limited Scope: Due to an actor-observer bias , they may not provide a broader context or interpretation of the events.

What is a Secondary Source?

Secondary source s analyse, interpret, or summarise information from primary sources. They offer a second-hand account and often provide context, interpretation, or a broader topic overview. The challenge here is to be wary of confirmation bias that can inadvertently influence these interpretations.

Examples of secondary sources include:

• Books: Often scholarly source books that interpret or analyse a topic or event.
• Articles: Journal or magazine articles that provide commentary, criticism, or analysis.
• Biographies: Life stories of individuals, which are interpretive accounts.
• Documentaries: Films that interpret or analyse historical events or figures.
• Encyclopedias & Reference Works: Summarised information on topics.
• Reviews: Literature reviews , Critiques of books, films, art, and other works.
• Essays & Critiques: Where the author analyses or comments on someone else’s work.

Advantages of Secondary Sources

• Comprehensive Overview: Secondary sources usually present a broader topic overview, providing context.
• Time-Efficiency: They summarise and interpret vast amounts of primary data, making it easier for the researcher, especially if they have a bias for action .
• Expert Analysis: Many secondary sources are produced by experts, offering informed and scholarly interpretations of primary information.

Limitations of Secondary Sources

• Potential for Misinterpretation: As these sources provide an interpretation, there’s a risk of publication bias or the Pygmalion effect influencing their perspectives.
• Possible Bias: The authors of secondary sources might introduce their own affinity bias , influencing the interpretation.
• Not as Current: Secondary interpretations might not reflect the latest findings or recent changes in understanding.

What is the Difference Between Primary and Secondary Sources?

How to Tell if a Source is Primary or Secondary

Telling if a source is primary or secondary can be pivotal in many types of research. When doing this differentiation, a good source evaluation method is indispensable.

Here is a guide to help you differentiate:

Primary Sources

Characteristics.

• Original Materials: Uninterpreted, unfiltered records of a time, event, people, or work.
• First-hand Information: It is directly from the person(s) involved or who directly witnessed an event.
• Unaltered State: Usually not changed or altered after their creation, unless they have been annotated or transcribed.
• Period: Typically from the time of the event or shortly thereafter.
• Autobiographies and memoirs
• Diaries, letters, emails, and other correspondence
• Photographs, audio recordings, and videos
• Raw research data
• Original hand-written manuscripts
• Official documents (birth certificates, trial transcripts)
• Artefacts, such as clothing, tools, or weapons
• Interviews, surveys, or fieldwork
• Newspapers and magazine articles written at the time of an event

Questions to Ask:

• Was this source created by someone directly involved in the events I’m researching?
• Was it created at the time of the event or shortly thereafter?
• Does it provide first-hand testimony or direct evidence concerning my topic?

Secondary Sources:

• Interpretation/Analysis: These sources discuss, interpret, analyse, consolidate, or “repackage” primary sources.
• Second-hand Information: It is one step removed from the primary original source.
• Summary/Overview: Often summarises or provides an overview of a topic based on primary sources.
• Books discussing a subject or historical event
• Journal articles reviewing past research
• Histories or documentaries
• Commentaries or critiques
• Encyclopedias or biographical works

Questions to Ask

• Does this source reinterpret or evaluate primary source materials?
• Was it created significantly after the events being discussed?
• Does it summarise or repackage information from other sources?

Remember, the distinction is not always clear-cut. Depending on the research question and context, some sources can function as both primary and secondary. For instance, a newspaper article can be a primary source when studying media portrayal of events at the time, but a secondary source is used for a historical overview. Always consider the nature of your research and the purpose of using the source.

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Primary Vs Secondary Sources: Which is Better?

Whether primary or secondary sources are “better” is subjective and depends on the context and purpose of your research or inquiry. Both types of sources have their strengths and weaknesses. Here’s a breakdown:

For a Comprehensive Understanding

Using a combination of both primary and secondary sources is ideal. Secondary sources can provide context, while primary sources offer a direct window into events or experiences.

For Academic or Historical Research

Primary sources are often valued because they provide direct evidence and can help researchers verify facts or understand first-hand accounts. However, secondary sources are crucial for understanding the broader context, historical interpretations, and trends.

For Quick Learning or an Overview

If you are just trying to grasp a topic or need a summary, secondary sources are often more accessible and straightforward due to the ceiling effect , which means reaching a limit in the amount of new information a source can provide.

Frequently Asked Questions 

What is a primary source vs a secondary.

A primary source is direct or first-hand evidence about an event, person, object, or work of art, often created during the event. A secondary source interprets, analyses, or summarises information from primary sources, offering a second-hand account or perspective on the original data.

Is an interview a primary vs secondary source?

An interview is a primary source because it provides first-hand testimony or direct evidence concerning a topic under investigation. It captures the interviewee’s direct experiences, views, or knowledge without being filtered, interpreted, or summarised by others, offering an original perspective on the discussed subject.

What is considered primary source vs secondary source in citations?

In citations, a primary source refers to direct or first-hand evidence, like original documents, artworks, or interviews. A secondary source, on the other hand, analyses, interprets or summarises primary sources, such as books that critique literature or articles that review original research. Secondary sources provide context or interpretation to primary data.

How to cite a primary source?

To cite a primary source, follow the citation style guide you’re using (e.g., APA, MLA, Chicago). Generally, include the author’s name, title of the source, publication or creation date, and any relevant details (e.g., publisher, location, page numbers). Different source types (letters, interviews, documents) might require specific citation elements.

Is a textbook a secondary source?

Yes, a textbook is typically considered a secondary source. It synthesises, interprets, and summarises information from primary and secondary sources, presenting an overview or comprehensive topic explanation. Textbooks provide context, commentary, and analysis rather than direct, first-hand evidence of events or original research.

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The CRAAP Test is an acronym used as a checklist to help individuals evaluate the credibility and relevance of sources, especially in academic or research contexts. CRAAP stands for Currency, Relevance, Authority, Accuracy, and Purpose. Each of these criteria can help a researcher determine if a source is trustworthy and suitable for their needs.

Academic sources, also known as scholarly sources or academic references, are materials used by researchers, scholars, and students to support their academic work. These sources are specifically created for use in academic contexts and contribute to the body of knowledge in a particular field of study.

In today’s information age, where vast amounts of knowledge are easily accessible, it is crucial to know how to use and represent that knowledge correctly and how to cite sources properly.

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At its simplest, a primary source is an account of something that happened by the people who were there, such as participants or witnesses. A secondary source is an account of something that happened by people who were NOT there, often framed as a review, summary, or analysis. Technically, a secondary source is a review or analysis of primary sources—there’s also what’s called a tertiary source, that analyzes secondary sources, and so on.

Simply put, people make mistakes. There’s an old party game called Telephone where a phrase is whispered from one person to the next around the room and at the end of the game, everybody is amused at how the phrase or its meaning has changed. Using secondary, tertiary, or other sources is like playing Telephone with your research. Reviews and other secondary accounts are summaries, so even at their best they omit parts of the original research and lack the detail and nuance of the original paper. At worst, a review author could entirely misunderstand or misrepresent the original research.

No, not at all. For older, well-established research that’s had ample time to be reviewed and consolidated into the general knowledge of the field, there’s no need to go back to primary source material unless you’re challenging the conventional interpretation.

The most common type of primary source used at Illinois Tech is the research paper written by the researcher(s) who actually carried out the work. These papers are typically published as articles in peer-reviewed journals but could also be in the form of a thesis or dissertation, research report, case study, clinical trial, etc. In addition to written reports, various ancillary materials can be primary sources. These include data, surveys, questionnaires, interviews, computer code, images, and other supporting materials that were generated or collected as part of the work.

Secondary sources may be published in peer-reviewed journals as well but most often occur in popular media, like websites, blogs, newspapers, etc. Secondary sources in peer-reviewed journals are easy to identify because they use the word “review” in the title or abstract and don’t present any new research. Also considered as secondary sources are any ancillary materials that were re-used or repurposed from other research.

Interestingly, primary source research papers almost always include a review of prior research as part of the introduction or as a “literature review” section. The primary source material only includes those parts that talk about the new research: the methodology, results, discussion of results, conclusions, or other similar sections.

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Evaluating Resources: Primary & Secondary Sources

Primary v. secondary sources.

A question to ask yourself when trying to identify primary or secondary sources is:

Did the person writing the thing do the thing?

While this may sound odd, the best indicator that something is a primary source is if the author of the piece actually DID the work that led to the creation of the resource.

These are some other things to consider with primary and secondary sources.

• Primary and secondary sources can be different publication types. Articles can be primary or secondary, just as books can be.
• Primary and secondary sources are not related to peer review in any way. Peer-reviewed articles can be either primary or secondary sources.
• There is no perfect database limiter for primary or secondary, either. There are no check boxes like there are with with peer review.
• Primary and secondary sources don't self identify as such. Nowhere in a primary source will it say, "this is a primary source." You need to evaluate the resource to figure it out.

Primary sources

In primary source documents, the person writing the piece actually did the research, or witnessed the event, or created something entirely new. These are some examples of primary sources:

• An author completes original research and then writes about it.
• An author writes about his or her experience of an event.
• An author creates an original theory or philosophy, and then writes about it.
• An author writes an original novel.

Secondary sources

Secondary sources evaluate or analyze what others have done or witnessed or created. The authors didn't go out and do it, they just analyzed it or wrote about it. These are some examples of secondary sources:

• Authors gather together a lot of primary research studies and then analyze them.  
• An author chooses a topic, finds a lot of articles on that topic, and writes about the topic based on other authors' research.  
• An author analyzes an original creative work.

Identifying primary & secondary sources

When looking at a resource to determine whether it is primary or secondary, words that describe the action of the author can be helpful. For example,  words like these can indicate actual research carried out:

• experimented
• investigated

In secondary resources, since the focus is on analyzing or discussion of a primary source, you would look for words that describe the action of the author indicating that this is an analysis or discussion, such as:

• reported on

You will need to examine the abstract and/or the article to determine if the resource is primary or secondary. While the words above can help indicate the type of resource, this is not a cut and dried process where if you see a particular word, that means the resource is always primary.

Locating a findings section in an article doesn't mean the source is either primary or secondary. Check to see whether the authors did the research themselves, or whether they analyzed research done by others.

Primary source example

For example, in the article, "School counselors' strategies for social justice change: A grounded theory of what works in the real world," these are some of the key elements from the abstract that indicate that it is a primary, research article:

• qualitative study
• grounded theory methodology
• explore the strategies that 16 school counselors
• Findings included seven overarching themes

The primary source authors actually talked to 16 school counselors, using grounded methodology, to come up with their findings based on the research that the authors actually did. Here, the authors did the research themselves and then reported on it.

Singh, A. A., Urbano, A., Haston, M., & McMahon, E. (2010). School counselors' strategies for social justice change: A grounded theory of what works in the real world. Professional School Counseling , 13 (3), 135-145. https://doi.org/10.5330/PSC.n.2010-13.135

• Abstract of School counselors' strategies for social justice change: A grounded theory of what works in the real world (PDF)

Secondary source example

This is an example of an article that is a secondary source, with some of the key elements highlighted:

In the article abstract, "Advocacy for health equity: A synthesis review," these are some of the key elements that indicate it is a secondary source article:

• aim of this review is to synthesize the evidence in the academic and gray literature
• systematic review of the academic literature and a fixed-length systematic search of the gray literature
• anaylzed our findings
• synthesized our findings
• made a critical appraisal of the literature
• brings together for the first time evidence from the academic and the gray literature and provides a building block for efforts to advocate for health equity

What makes the secondary source secondary is that the authors used other authors' research, analyzing and synthesizing the information to come up with their conclusions, or findings.

Farrer, L., Marinetti, C., Cavaco, Y. K., & Costongs, C. (2015). Advocacy for health equity: A synthesis review. Milbank Quarterly , 93 (2), 392-437. https://doi.org/10.1111/1468-0009.12112

• Abstract of Advocacy for health equity: A synthesis review (PDF)
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Primary and Secondary Sources

Oct 03, 2014

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Primary and Secondary Sources. What are they?. Primary sources. A primary source is an original object or document; first-hand information . Primary source is material written or produced in the time period that you may be investigating.

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Primary and Secondary Sources What are they?

Primary sources • A primary source is an original object or document; first-hand information. • Primary source is material written or produced in the time period that you may be investigating. • Primary sources enable the researcher to get as close as possible to what actually happened during an historical event or time period.   

Examples of Primary Source • Diaries and journals • Example: Anne Frank was a teenager during World War II. She kept a diary or journal the years before she died in a concentration camp. Her diary was later published as the “Diary of Anne Frank”. This is a primary source. • Example: Sarah Morgan was young woman during the Civil War. She wrote in her diary or journal what happened to her and her family during the war. This is a primary document because it was first hand. She wrote it at the time it happened. • Sarah Morgan Dawson: A Confederate Girl's Diary

Examples of Primary Source • Autobiographies • An autobiography is when you write a story or book about yourself. • Example: Nelson Mandela wrote his autobiography about events in his life called “Long Walk to Freedom: The Autobiography of Nelson Mandela. This is a primary document because he wrote his first hand experiences.

Examples of Primary Source • Speeches are considered Primary Sources. • Examples of Speeches: • Abraham Lincoln’s “Gettysburg Address” • Martin Luther King’s “I Have a Dream” • All of the President’s Inauguration Speeches.

Primary Source • Historical documents such as the Declaration of Independence or the Constitution are primary documents. They were drafted and signed. • Other Primary Sources would be • Birth Certificates • Government records • Deeds • Court documents • Military records • Tax records • Census records • Art

Examples of Primary Source • Published first-hand accounts, or stories are considered primary resources. • Example: 2008 Presidential candidate Senator John McCain talked about his “own” experiences as a Vietnam prisoner of war. It is a primary source because he was there, experienced the events and shared it first hand. • The television stations found footage of Senator McCain at the time that he was released. Those videos are also considered primary sources because it was filmed when it occurred.

Examples of Primary Source • Sound Recordings and interviews are considered primary resources. • Example 1: During the Great Depression and World War II, television had not been invented yet. The people would often sit around the radio to listen to President Roosevelt’s war messages. Those radio addresses are considered “primary sources.” • Example 2: During the 2008 election Barack Obama, had many interviews that were televised. Those interviews are considered primary sources.

Examples of Primary Source • Photographs and videos are primary sources. • Example 1: Photographers during World War II took photographs of battles and/or events during the war. Those photographs are primary sources. Those were taken during actual events. • Example 2: The same holds true for videos or film created during an event. A film was made interviewing President Bush. That film would be considered a primary source.

Examples of Primary Source • Letters are considered primary documents. • Example: Soldiers during wars wrote to their families about war events they experienced. Those letters are considered primary sources. • See example of Civil War Letters

Primary or Secondary Sources? • Newspaper and Magazine articles can be a primary or secondary sources. • If the article was written at the time something happened, then it is a primary source. • Example: The articles written on Barack Obama’s inauguration in 2009 are primary sources. • However, if a reporter in 2009 wrote about George Washington’s inauguration using information written by someone else (1789), that would be a secondary source.

Summary: • I learned that primary sources are….. • Primary sources are valuable…..

What is a Secondary Source? • A secondary source is something written about a primary source. • Secondary sources are written "after the fact" - that is, at a later date. • Usually the author of a secondary source will have studied the primary sources of an historical period or event and will then interpret the "evidence" found in these sources. • You can think of secondary sources as second-hand information.

Examples of Secondary Sources • Biography • Example: A biography is when you write about another person’s life. Alice Fleming wrote a biography on the life of Martin Luther King Jr. This is a secondary document. It was written about him after he died.

Examples of Secondary Source • Think about it like this…. • If I tell you something, I am the primary source. If you tell someone else what I told you, you are the secondary source. • Secondary source materials can be articles in newspapers, magazines, books or articles found that evaluate or criticize someone else's original research

Examples of Secondary Source • Almanacs, encyclopedias, history books (textbooks), etc. are all secondary sources because they were written “after” the these events occurred.

Let’s practice ___1. Diary kept by John Smith, a soldier in the Confederate Army, published in a collection of Alabama papers ___2. Photograph of George Washington Carver taken in 1898 ___3. Biography of George Washington ___4. Newspaper article about the assassination of President Kennedy written on November 23, 1963 ___5. Television mini-series about President Franklin Roosevelt’s life

Practice continue… __6. Map of the world drawn in 1553 located in Library of Congress ___7. Photograph album containing pictures of classmates at Cal State University in 1923. ___8. Letter written by Emily Smith to her friend Paula Jones, May 3, 1826, describing her trip by wagon from North Carolina to Huntsville, Alabama and the log cabin her father was building ___9. Article about Martin Luther King, Jr., in People Magazine, 1988 ___10. Information about Creek Indians in World Book Encyclopedia

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