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"a narrative summary and evaluation of the findings or theories within a literature base.  Also known as 'narrative literature review'. "

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Examples of Literature Reviews

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How to Write a Literature Review: Writing a Literature Review in APA Format

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How to Write a Literature Review in APA Format

To complete a literature review, you must decide on your topic, research academic databases, organize your findings and write your review. The American Psychological Association provides specific guidelines for writing your review, from overall organization to minute details in formatting. Once you have organized and analyzed your findings, use APA style to write your review.

Format Your Document

Before you begin writing, ensure that your document is formatted properly. Set your page margins to 1 inch and double your spacing unless otherwise specified. Your font should be 12 point Times New Roman. Your header will contain a running heading and the page number on every page, including the title page. The page number should always be at the top right corner.

The title page will first introduce the running heading with the tag: "Running Heading: AND THE HEADING IN ALL CAPS." The title page should contain the title, the author, your name and your institution, all doubled-spaced and centered in the middle of the page.

Organize Your Sections

The essential sections for a literature review are the:

• introduction
• body -- organized by main points

An abstract may be included, though it is not required. In your introduction , include a summary of the focus of your review and why it is important. For example, if you are reviewing studies about student motivation, explain that it is important for teachers and parents to be aware of what motivates students to learn, and include if there has been little or a lot of research on the subject.

Organize your body using your main points , with bold, centered headings. For example, after you have researched different studies examining student motivation, organize the body of your review based on motivating factors. In the section about parental approval, discuss studies that measured the effects parental approval had on student motivation. Your final section will be references.

Cite Your Sources

APA style includes specific, detailed instructions for in-text citations . Each time you refer to a study by restating information or findings, include a citation in parentheses. The general format is to list the last name of the author, followed by a comma and the publication year, all enclosed in parentheses. For example:

Fear of failing has been found to motivate some students (Jones, 2010).

If there are two or more authors , list the last names, separated by commas. Include the "&" symbol before the last name. For example, some students reported being afraid of failure (Jones, Smith, & Williams, 2010). If you cite the author in the reference, include only the year. For example: Jones found that some students are motivated by fear of failing (2010). If you are citing multiple studies, list them alphabetically by the first listed author.

Include Your References

Your references should begin on a new piece of paper with a bold, centered heading: References. Organize your studies alphabetically by the last name of the first author. A study by A. Brown and T. Roberts would come before a study by R. Clark and M. Adams, because Brown is alphabetically before Clark. All references are only single-spaced after periods.

The general format is the same for scholarly journals. List the last name, comma and first initial of every author. Put the date the article was published in parentheses. Write the title of the article with only the first word capitalized, followed by a period. Write the publication name in italics, followed by volume number if applicable. Finally, list the page numbers, for example:

Brown, A., & Roberts, T. (2010). Effects of fear of failure on student success in the classroom. Journal of Research, 23, 34-48.

The difference for books is that the title of the book is italicized, and location of the publisher is listed, for example:

Clark, R., & Adams, M.N. (2011). Why children succeed in the classroom. New York: Education Press.

• Purdue University Online Writing Lab: Types of APA Papers: Literature Review
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Hannah Richardson has a Master's degree in Special Education from Vanderbilt University and a Bacheor of Arts in English. She has been a writer since 2004 and wrote regularly for the sports and features sections of "The Technician" newspaper, as well as "Coastwach" magazine. Richardson also served as the co-editor-in-chief of "Windhover," an award-winning literary and arts magazine. She is currently teaching at a middle school.

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• How to Write a Literature Review | Guide, Examples, & Templates

How to Write a Literature Review | Guide, Examples, & Templates

Published on January 2, 2023 by Shona McCombes . Revised on September 11, 2023.

What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research that you can later apply to your paper, thesis, or dissertation topic .

There are five key steps to writing a literature review:

• Search for relevant literature
• Evaluate sources
• Identify themes, debates, and gaps
• Outline the structure
• Write your literature review

A good literature review doesn’t just summarize sources—it analyzes, synthesizes , and critically evaluates to give a clear picture of the state of knowledge on the subject.

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Table of contents

What is the purpose of a literature review, examples of literature reviews, step 1 – search for relevant literature, step 2 – evaluate and select sources, step 3 – identify themes, debates, and gaps, step 4 – outline your literature review’s structure, step 5 – write your literature review, free lecture slides, other interesting articles, frequently asked questions, introduction.

• Quick Run-through
• Step 1 & 2

When you write a thesis , dissertation , or research paper , you will likely have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

• Demonstrate your familiarity with the topic and its scholarly context
• Develop a theoretical framework and methodology for your research
• Position your work in relation to other researchers and theorists
• Show how your research addresses a gap or contributes to a debate
• Evaluate the current state of research and demonstrate your knowledge of the scholarly debates around your topic.

Writing literature reviews is a particularly important skill if you want to apply for graduate school or pursue a career in research. We’ve written a step-by-step guide that you can follow below.

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Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.

• Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
• Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
• Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
• Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)

You can also check out our templates with literature review examples and sample outlines at the links below.

Download Word doc Download Google doc

Before you begin searching for literature, you need a clearly defined topic .

If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research problem and questions .

Make a list of keywords

Start by creating a list of keywords related to your research question. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list as you discover new keywords in the process of your literature search.

• Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
• Body image, self-perception, self-esteem, mental health
• Generation Z, teenagers, adolescents, youth

Search for relevant sources

Use your keywords to begin searching for sources. Some useful databases to search for journals and articles include:

• Your university’s library catalogue
• Google Scholar
• Project Muse (humanities and social sciences)
• Medline (life sciences and biomedicine)
• EconLit (economics)
• Inspec (physics, engineering and computer science)

You can also use boolean operators to help narrow down your search.

Make sure to read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.

You likely won’t be able to read absolutely everything that has been written on your topic, so it will be necessary to evaluate which sources are most relevant to your research question.

For each publication, ask yourself:

• What question or problem is the author addressing?
• What are the key concepts and how are they defined?
• What are the key theories, models, and methods?
• Does the research use established frameworks or take an innovative approach?
• What are the results and conclusions of the study?
• How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
• What are the strengths and weaknesses of the research?

Make sure the sources you use are credible , and make sure you read any landmark studies and major theories in your field of research.

You can use our template to summarize and evaluate sources you’re thinking about using. Click on either button below to download.

Take notes and cite your sources

As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.

It is important to keep track of your sources with citations to avoid plagiarism . It can be helpful to make an annotated bibliography , where you compile full citation information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.

To begin organizing your literature review’s argument and structure, be sure you understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:

• Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
• Themes: what questions or concepts recur across the literature?
• Debates, conflicts and contradictions: where do sources disagree?
• Pivotal publications: are there any influential theories or studies that changed the direction of the field?
• Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?

This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.

• Most research has focused on young women.
• There is an increasing interest in the visual aspects of social media.
• But there is still a lack of robust research on highly visual platforms like Instagram and Snapchat—this is a gap that you could address in your own research.

There are various approaches to organizing the body of a literature review. Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).

Chronological

The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarizing sources in order.

Try to analyze patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.

If you have found some recurring central themes, you can organize your literature review into subsections that address different aspects of the topic.

For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.

Methodological

If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:

• Look at what results have emerged in qualitative versus quantitative research
• Discuss how the topic has been approached by empirical versus theoretical scholarship
• Divide the literature into sociological, historical, and cultural sources

Theoretical

A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.

You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.

Like any other academic text , your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.

The introduction should clearly establish the focus and purpose of the literature review.

Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.

As you write, you can follow these tips:

• Summarize and synthesize: give an overview of the main points of each source and combine them into a coherent whole
• Analyze and interpret: don’t just paraphrase other researchers — add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
• Critically evaluate: mention the strengths and weaknesses of your sources
• Write in well-structured paragraphs: use transition words and topic sentences to draw connections, comparisons and contrasts

In the conclusion, you should summarize the key findings you have taken from the literature and emphasize their significance.

When you’ve finished writing and revising your literature review, don’t forget to proofread thoroughly before submitting. Not a language expert? Check out Scribbr’s professional proofreading services !

This article has been adapted into lecture slides that you can use to teach your students about writing a literature review.

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If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.

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A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a thesis, dissertation , or research paper , in order to situate your work in relation to existing knowledge.

There are several reasons to conduct a literature review at the beginning of a research project:

• To familiarize yourself with the current state of knowledge on your topic
• To ensure that you’re not just repeating what others have already done
• To identify gaps in knowledge and unresolved problems that your research can address
• To develop your theoretical framework and methodology
• To provide an overview of the key findings and debates on the topic

Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.

The literature review usually comes near the beginning of your thesis or dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

A literature review is a survey of credible sources on a topic, often used in dissertations , theses, and research papers . Literature reviews give an overview of knowledge on a subject, helping you identify relevant theories and methods, as well as gaps in existing research. Literature reviews are set up similarly to other  academic texts , with an introduction , a main body, and a conclusion .

An  annotated bibliography is a list of  source references that has a short description (called an annotation ) for each of the sources. It is often assigned as part of the research process for a  paper .  

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Writing Center Literature Reviews: Literature Reviews

Literature reviews.

A literature review is a summary of published information in a subject area; sometimes limited to a specific time period. Researchers benefit from literature reviews since they provide critical evaluation of what has been published on a topic by accredited scholars and researchers. Oftentimes a literature review will highlight disagreements between different scholars or schools of thought. The following literature review examples are just two types found in scholarly literature and does not reflect the format you may need to produce for your assignment. 

Example: Literature Review in a Standalone Article

A literature review can be a standalone document that provides a survey of current research in a particular field or subject. Notice this entire article is dedicated to reviewing literature on the topic.

Example: Literature Review in Original Research

A literature review may also be located at the beginning of an original research article. Notice this article's literature review is located only in the beginning of the article before the Methodology section.

Literature Review

Literature review provides a narrative summary and evaluation of the findings or theories within a literature base. The literature base may include qualitative, quantitative, and/or mixed methods research. Literature reviews capture trends in the literature. 

When writing a literature review, here are some things to consider

Consider what the assignment prompt is asking you to highlight within your literature review. 

Is it part of a research paper (usually found after the introduction) or

Are you asked to summarize previous literature to inform readers of the state of the research?

You may need to identify relations, contradictions, gaps, and inconsistencies in the literature.

Parts of a literature review may include: 

An Introduction, Body, & Conclusion.

A literature review may be organized 

Chronological - to identify the development of the topic

Thematic - grouping research on the basis of similarity in the topic and concepts. 

Methodological - if you are pulling together information from various fields that use different research methods. 

Theoretical - in order to discuss different theories, models, and key concepts. 

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For more information on how to cite Book Reviews in APA 7, refer to pages 334-335 of the Publication Manual of the APA located at the circulation desk.

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Author of Review's Last Name, First Initial. (Year of Publication). Title of Review. [Review of the book  Title of Book: Subtitle if Any , by Book Author's First Initial. Second Initial if Given Last Name].  Title of Website , URL

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How to Cite a Review in APA Referencing

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• 8th November 2020

Reviews of books, films, and other media can be great sources in academic writing. But how do you cite a review using APA referencing ? In this post, we explain the basics of citations and the reference list entry.

In-Text Citations for a Review in APA Style

Citations for a review in APA referencing are similar to those for other sources. This means you cite the reviewer’s surname and year of publication:

One review was especially scathing (Smith, 2001).

In addition, if you quote a print source, make sure to cite a page number:

Smith (2001) dismisses the argument as “puerile” (p. 16).

For more on APA citations, see our blog post on the topic .

Reviews in an APA Reference List

The format for a review in an APA reference list will depend on where it was published. For instance, for a review published in a newspaper, you would cite it as a newspaper article . But for a review published on a blog or website, you would cite it as a blog post or website instead.

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In all cases, though, you will need to adapt the format by adding details of the thing being reviewed in square brackets after the review title.

You can see APA-style references for reviews from an academic journal and a website below, complete with this extra information:

Smith, G. (2001). A backward step for applied ethics [Review of the book Righteous Thought, Righteous Action , by X. Morrison]. Journal of Applied Philosophy , 18(1), 16–24.

Bert, E. (2018). Neil Breen outdoes himself again [Review of the film Twisted Pair , by N. Breen, Dir.]. BadMovieCentral. http://www.badmoviecentral.com/reviews/twisted-pair/

This ensures the reader can identify both the review you’re citing and the thing being reviewed from the reference list entry alone.

Expert APA Proofreading

To make sure your references are all in order, as well as the rest of your academic writing, check out our free online APA guide . You might also want to get your work proofread by one of our APA experts. Learn more about our APA proofreading services here.

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What is a Lit Review?

How to write a lit review.

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Main Objectives

Examples of lit reviews, additional resources.

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What is a literature review?

• Either a complete piece of writing unto itself or a section of a larger piece of writing like a book or article
• A thorough and critical look at the information and perspectives that other experts and scholars have written about a specific topic
• A way to give historical perspective on an issue and show how other researchers have addressed a problem
• An analysis of sources based on your own perspective on the topic
• Based on the most pertinent and significant research conducted in the field, both new and old

• A descriptive list or collection of summaries of other research without synthesis or analysis
• An annotated bibliography
• A literary review (a brief, critical discussion about the merits and weaknesses of a literary work such as a play, novel or a book of poems)
• Exhaustive; the objective is not to list as many relevant books, articles, reports as possible
• To convey to your reader what knowledge and ideas have been established on a topic
• To explain what the strengths and weaknesses of that knowledge and those ideas might be
• To learn how others have defined and measured key concepts    
• To keep the writer/reader up to date with current developments and historical trends in a particular field or discipline
• To establish context for the argument explored in the rest of a paper
• To provide evidence that may be used to support your own findings
• To demonstrate your understanding and your ability to critically evaluate research in the field
• To suggest previously unused or underused methodologies, designs, and quantitative and qualitative strategies
• To identify gaps in previous studies and flawed methodologies and/or theoretical approaches in order to avoid replication of mistakes
• To help the researcher avoid repetition of earlier research
• To suggest unexplored populations
• To determine whether past studies agree or disagree and identify strengths and weaknesses on both sides of a controversy in the literature

• Choose a topic that is interesting to you; this makes the research and writing process more enjoyable and rewarding.
• For a literature review, you'll also want to make sure that the topic you choose is one that other researchers have explored before so that you'll be able to find plenty of relevant sources to review.

• Your research doesn't need to be exhaustive. Pay careful attention to bibliographies. Focus on the most frequently cited literature about your topic and literature from the best known scholars in your field. Ask yourself: "Does this source make a significant contribution to the understanding of my topic?"
• Reading other literature reviews from your field may help you get ideas for themes to look for in your research. You can usually find some of these through the library databases by adding literature review as a keyword in your search.
• Start with the most recent publications and work backwards. This way, you ensure you have the most current information, and it becomes easier to identify the most seminal earlier sources by reviewing the material that current researchers are citing.

The organization of your lit review should be determined based on what you'd like to highlight from your research. Here are a few suggestions:

• Chronology : Discuss literature in chronological order of its writing/publication to demonstrate a change in trends over time or to detail a history of controversy in the field or of developments in the understanding of your topic.  
• Theme: Group your sources by subject or theme to show the variety of angles from which your topic has been studied. This works well if, for example, your goal is to identify an angle or subtopic that has so far been overlooked by researchers.  
• Methodology: Grouping your sources by methodology (for example, dividing the literature into qualitative vs. quantitative studies or grouping sources according to the populations studied) is useful for illustrating an overlooked population, an unused or underused methodology, or a flawed experimental technique.

• Be selective. Highlight only the most important and relevant points from a source in your review.
• Use quotes sparingly. Short quotes can help to emphasize a point, but thorough analysis of language from each source is generally unnecessary in a literature review.
• Synthesize your sources. Your goal is not to make a list of summaries of each source but to show how the sources relate to one another and to your own work.
• Make sure that your own voice and perspective remains front and center. Don't rely too heavily on summary or paraphrasing. For each source, draw a conclusion about how it relates to your own work or to the other literature on your topic.
• Be objective. When you identify a disagreement in the literature, be sure to represent both sides. Don't exclude a source simply on the basis that it does not support your own research hypothesis.
• At the end of your lit review, make suggestions for future research. What subjects, populations, methodologies, or theoretical lenses warrant further exploration? What common flaws or biases did you identify that could be corrected in future studies?

• Double check that you've correctly cited each of the sources you've used in the citation style requested by your professor (APA, MLA, etc.) and that your lit review is formatted according to the guidelines for that style.

Your literature review should:

• Be focused on and organized around your topic.
• Synthesize your research into a summary of what is and is not known about your topic.
• Identify any gaps or areas of controversy in the literature related to your topic.
• Suggest questions that require further research.
• Have your voice and perspective at the forefront rather than merely summarizing others' work.
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• Literature Reviews: Introduction - University Library at Georgia State
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• Write a Literature Review - University Library at UC Santa Cruz
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Literature Review: Conducting & Writing

• Sample Literature Reviews
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• Finding "The Literature"
• Organizing/Writing
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Sample Lit Reviews from Communication Arts

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• Last Updated: Aug 8, 2024 11:00 AM
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Appropriate Level of Citation

The number of sources you cite in your paper depends on the purpose of your work. For most papers, cite one or two of the most representative sources for each key point. Literature review papers, however, typically include a more exhaustive list of references.

Provide appropriate credit to the source (e.g., by using an in-text citation) whenever you do the following:

• paraphrase (i.e., state in your own words) the ideas of others
• directly quote the words of others
• refer to data or data sets
• reprint or adapt a table or figure, even images from the internet that are free or licensed in the Creative Commons
• reprint a long text passage or commercially copyrighted test item

Avoid both undercitation and overcitation. Undercitation can lead to plagiarism and/or self-plagiarism . Overcitation can be distracting and is unnecessary.

For example, it is considered overcitation to repeat the same citation in every sentence when the source and topic have not changed. Instead, when paraphrasing a key point in more than one sentence within a paragraph, cite the source in the first sentence in which it is relevant and do not repeat the citation in subsequent sentences as long as the source remains clear and unchanged.

Figure 8.1 in Chapter 8 of the Publication Manual provides an example of an appropriate level of citation.

Determining the appropriate level of citation is covered in the seventh edition APA Style manuals in the Publication Manual Section 8.1 and the Concise Guide Section 8.1

Related handouts

• In-Text Citation Checklist (PDF, 227KB)
• Six Steps to Proper Citation (PDF, 112KB)

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Demystifying the APA Factor: Crafting Effective Literature Reviews in APA Format

A comprehensive guide for writing literature reviews to the 7th edition,, introduction:.

Adhering to proper format is like speaking a common language that ensures clarity and coherence. The American Psychological Association’s (APA) format is essential in literature reviews – organizing ideas clearly while accurately citing sources. Here at this blog, we aim to help navigate you through all the subtle complexities associated with using APA Style for literature reviews by equipping you with the tools needed for crafting well-structured reviews that meet this standard APA-styled literature reviews together. Whether an experienced researcher or curious student, join us on this exciting journey into APA formatted literature reviews!

Navigating APA Format in Literature Reviews

When citing sources and creating literature reviews, the APA format offers a standardized structure that ensures clarity and consistency. Here’s how to seamlessly integrate this style of format into your literature review:

• In-Text Citations : Properly attribute sources within your text by including the author’s last names and publication years (Smith 2021)
• Reference Lists : Develop an exhaustive list of all sources cited alphabetically according to the author’s last name (a list that can serve as an easy resource when doing further research on sources you’ve mentioned in-text or outright cite).
• Headings and Subheadings : Organize your literature review using descriptive headings that lead readers through its analysis.

4. Tables and Figures : Present data in tables or figures when necessary and ensure they are correctly labeled or cited.

• Quotations : When directly quoting from sources, use quotation marks and provide page numbers as appropriate to accurately locate it. Let’s review an example to help better comprehend the APA format in action.

Author’s Name (Year). Title of Article. Title of Journal Volume/Issue Number/Pages Range

Crafting an APA 7th edition literature review involves several key steps.

Here is an approach:

• Introduction and Context.
• Search Strategy.
• Arrange Your Review : Group studies by themes or concepts.
• Critical Evaluation : Assess each study’s strengths and weaknesses
• Synthesize Findings , which outline common trends, patterns, and gaps within the literature.
• Conclude and Propose : Summarize key takeaways and suggest areas for future research.

Conclusion: Strengthen Your Literature Reviews with APA

The APA format serves as a compass in the complex world of literature reviews. Adherence to its conventions will increase clarity and impact in your work; when embarking upon crafting literature reviews, remember this format as your journey. Its consistency ensures maximum research returns, and its foundation can enable further discovery for years.

Start Now: When writing a literature review, use APA format principles as your foundation, and you will make your work stand out while contributing to academic dialogue more broadly.

Discover More on Manuscripedit.com . Gain deeper insights into effective literature review writing, formatting, and guidance by exploring Manuscripedit.com. Upgrade your research and writing abilities using resources geared toward experienced researchers, students, and professionals.

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APA In-Text Citations for Research Writing

Why Use In-Text Citations?

When writing a journal article, literature review, convention paper, or any other academic document, authors must include in-text citations whenever they refer to, summarize, paraphrase, or quote from another source. In addition, every time a work is cited within a paper (in APA style, a parenthetical citation), a corresponding entry must be included in the reference list.

How to Cite a Research Paper Using In-Text Citations

The rationale behind citing other people’s publications in your own manuscript is that you want to avoid intellectual dishonesty by giving credit to whoever reported a finding first or invented a specific technique. This is not only an ethical question, as being “sloppy” with your sources can easily be considered plagiarism (and even self-plagiarism , if you fail to refer to your own work), which can have legal consequences and damage your reputation.

General rules for what information should be provided when citing sources in a research paper vary across fields and depend on the type of source (e.g., books, journal articles, patents, conference proceedings, websites, etc.). We are not going into such differences here but will focus on the correct way of referencing other people’s research in your own paper according to one of the most common styles used to cite sources within the social sciences and in several other academic disciplines , that is, APA (American Psychological Association) style .

In research papers, in-text citations are most commonly used in the Introduction and Discussion Results sections. The following guidelines and examples are taken from the APA Publication Manual, 6th edition, 2nd printing , which details rules and application of APA style in research papers, including in-text citations, endnotes/footnotes, and references. For more information, consult the APA Style Manual website .

This resource provides detailed guidelines for citing sources in your paper and includes examples of in-text citations for reference by research authors. Before submitting your manuscript to a journal or publisher, be sure to use our free APA citation generator for your references and in-text citations.

APA Citation Rules: The Basics

Order and structure of in-text citation content.

When using APA format, follow the “author-date” method of in-text citation. Write the author’s last name and publication year for the source in parentheses and separate these pieces of information with a comma.

When referring to external work or referencing an entire work but not directly quoting the material, you only need to make a reference to the author and year of publication and not the page number in your citation.

The results of the first enzyme study (Chen et al., 2014) revealed several relationships.

If you mention the name of the author of the work in the sentence or earlier in the paragraph, you only need to include the year of publication in the citation.

Chen (2014) discusses several relationships revealed in this study.

Verb tense used in referring to other works

APA style requires authors to use past tense or present perfect tense (NOT present tense) when using signal phrases to refer to or discuss previous research (have a look at this article for more details on the correct tenses for different parts of a research paper ).

Radnitz (1995) found… / Radnitz (1995) has found…

Placement of in-text citations in the sentence (no quotation)

When referring to a specific work or works, place the citation (publication date only) directly after the author of the study referenced.

Klinge and Rogers (2010) found that mirroring is instrumental in developments of performative gender roles.

When giving information that reflects the results or implications of previous work, place the citation (author and publication date) at the end of the sentence.

Mirroring has been found to be instrumental in the development of performative gender roles (Klinge and Rogers, 2010).

Capitalization

Always capitalize author names and initials in in-text citations.

(r. kazinsky, 2014)    (R. Kazinsky, 2014)

In-Text Citation Rules for Short Quotations

When quoting directly from a work, include the author, publication year, and page number of the reference (preceded by “p.”).

Method 1 : Introduce the quotation with a signal phrase that includes the author’s last name; the publication year will follow in parentheses. Include the page number in parentheses at the end of the quoted text. Note that the quotation marks surround the text only, and not the parenthetical citation.

According to Khan (1976), “Graduate students tend to apply more diverse methods during their first two years of research” (p. 45). Khan (1976) noted that “graduate students tend to apply more diverse methods during their first two years of research” (p. 45), a fact that has profound implications for research departments.

Method 2 : If the author is absent in the signal phrase, include the author’s last name, the publication year, and the page number together in parentheses after the quoted text.

Researchers noted that “graduate students tend to apply more diverse methods during their first two years of research” (Khan, 1976, p. 45), but they did not offer a suggestion as to the cause.

In-text Citation Rules for Long Quotations

Long direct quotations are those with at least 40 words of quoted text in a row. Long quotes should be placed in a separate block of lines without quotation marks, similar to creating a new paragraph. Begin the quotation on a new line and indent 0.5in/1.27cm from the left margin. Type the entire quotation within these new margins using double-spacing. Include the parenthetical citation after the final punctuation mark.

Khan’s (1976) study found the following: Graduate students tend to apply more diverse methods during their first two years of research, especially when conducting research in teams of three or fewer with no senior researchers    present. This tendency could be attributed to either a misunderstanding of correct methodology or to a feeling of freedom to explore different approaches that the researchers have yet to employ. (p. 45)

Summarizing and Paraphrasing Other Works

When  paraphrasing another work , you only need to cite the author and year of publication in your in-text citation. It may be a good idea to include the page number as well if the paraphrased information is located on a specific page of the original text. APA guidelines encourage this inclusion but do not require it.

According to Khan (1976), new researchers tend to use more diverse methodologies. New researchers tend to use more diverse methodologies (Khan, 1976, p. 45).

Common Signal Phrases for Introducing External Works

• According to Johnson (publication year)…
• As Johnson (publication year) has noted…
• Johnson and Smith (publication year) contend that…
• As Johnson’s (2011) study revealed…

Citing Works by Multiple Authors/Editors

When making an in-text citation of works by multiple authors, there are specific rules to follow depending on the number of authors of a publication and the number of times you cite the same works.

Citing Multiple Works in One In-text Citation

When citing more than one source in the same in-text citation, list all sources in the standard way and separate them with a semi-colon. List the sources alphabetically (by author’s last name or by title if no author is given) in the order they appear in the reference list.

(Marsh, 1997; Johnson, 2002). (Kazinsky, 2017; “Three Different Roads,”  2013).

Citing Works by the Same Author with the Same Publication Year

When citing two or more sources with the same author and year of publication, assign lowercase letters directly after the year of publication (a, b, c) according to the alphabetical order of titles. You will use the same alphabetical designations in your in-text citations that you do in your reference list.

The incidence of West Nile virus in Florida increased between 2002 and 2004 (Dickens, 2014a). According to Dickens (2014b), “these viral infections were precipitated by record levels of rainfall around the peninsula” (p. 150).

Citing a Work Quoted in another Source

Work quoted or paraphrased in another text is called a “secondary source.” While in your reference list you must cite the primary source as well, in your in-text citation you will add the words “as cited in” followed by the secondary source. For example, if a review article by Franklin you are citing includes a useful quote by Adams that supports your paper, your in-text citation would look like this:

According to a study by Adams (as cited in Franklin, 2016), 25% of all US federal prisoners have been diagnosed with some form of social disorder. Adams (as cited in Franklin) contends that this statistic “reflects the dehumanizing conditions of most federal institutions” (p. 76).

Citing Web Pages

Entire website.

When citing an entire website (with no specific webpage or article given), simply provide the title and web address within the text of your paper. No citation is needed in the References.

The American Psychological Association includes detailed information on how to apply APA citation (http://www.apa.org).

Webpage with author(s)

A webpage with an individual author or authors should be cited in the same way as other texts, with the name or names written first, followed by the publication year.

There were 523 new cases reported in 2011 alone (Kristoff, 2012).

Webpage with a group author

Treat group authors as individual authors in in-text citations, but instead of the author’s last name, include the name of the group.

Claustrophobia afflicts one in five Britons (The Surrey Group, 2003).

Webpage with missing information

Even when some central information is missing from a website (e.g., no author, date, or webpage title), you may still cite it as a source if you use the correct formatting. For information on how to cite a website with missing information, visit the APA Style Blog post on  Missing Pieces .

Citing social media sources

For a more comprehensive explanation of social media citation guidelines, visit the APA Style Blog post on  How to Cite Social Media in APA Style .

And when submitting your finished AP document to journals or for a class assignment, be sure to get professional English editing services , including academic editing , manuscript editing , and research paper editing services . Professional editors with experience in APA, AMA, MLA, and other popular style guides will make sure that your document’s citations and references conform to the journal of your choice.

Wordvice Resources

Wordvice provides a variety of other articles on topics such as the number of references your manuscript should contain , different citation styles if your target style does not use APA, and how to paraphrase correctly when citing sources in your paper, as well as more general advice on how to write research papers on the Wordvice academic resources website .

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Cite a Review

Don't let plagiarism errors spoil your paper, consider your source's credibility. ask these questions:, contributor/author.

• Has the author written several articles on the topic, and do they have the credentials to be an expert in their field?
• Can you contact them? Do they have social media profiles?
• Have other credible individuals referenced this source or author?
• Book: What have reviews said about it?
• What do you know about the publisher/sponsor? Are they well-respected?
• Do they take responsibility for the content? Are they selective about what they publish?
• Take a look at their other content. Do these other articles generally appear credible?
• Does the author or the organization have a bias? Does bias make sense in relation to your argument?
• Is the purpose of the content to inform, entertain, or to spread an agenda? Is there commercial intent?
• Are there ads?
• When was the source published or updated? Is there a date shown?
• Does the publication date make sense in relation to the information presented to your argument?
• Does the source even have a date?
• Was it reproduced? If so, from where?
• If it was reproduced, was it done so with permission? Copyright/disclaimer included?
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