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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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See an example

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.

Prevent plagiarism. Run a free check.

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.

Scribbr slides are free to use, customize, and distribute for educational purposes.

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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.

• Sampling methods
• Simple random sampling
• Stratified sampling
• Cluster sampling
• Likert scales
• Reproducibility

 Statistics

• Null hypothesis
• Statistical power
• Probability distribution
• Effect size
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Research bias

• Optimism bias
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• Implicit bias
• Hawthorne effect
• Anchoring bias
• Explicit bias

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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Libraries | Research Guides

Literature reviews, what is a literature review, learning more about how to do a literature review.

• Planning the Review
• The Research Question
• Choosing Where to Search
• Organizing the Review
• Writing the Review

A literature review is a review and synthesis of existing research on a topic or research question. A literature review is meant to analyze the scholarly literature, make connections across writings and identify strengths, weaknesses, trends, and missing conversations. A literature review should address different aspects of a topic as it relates to your research question. A literature review goes beyond a description or summary of the literature you have read. 

• Sage Research Methods Core This link opens in a new window SAGE Research Methods supports research at all levels by providing material to guide users through every step of the research process. SAGE Research Methods is the ultimate methods library with more than 1000 books, reference works, journal articles, and instructional videos by world-leading academics from across the social sciences, including the largest collection of qualitative methods books available online from any scholarly publisher. – Publisher

• Next: Planning the Review >>
• Last Updated: Jul 8, 2024 11:22 AM
• URL: https://libguides.northwestern.edu/literaturereviews

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Literature Reviews

• What is a literature review?
• Steps in the Literature Review Process
• Define your research question
• Determine inclusion and exclusion criteria
• Choose databases and search
• Review Results
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What is a Literature Review?

A literature or narrative review is a comprehensive review and analysis of the published literature on a specific topic or research question. The literature that is reviewed contains: books, articles, academic articles, conference proceedings, association papers, and dissertations. It contains the most pertinent studies and points to important past and current research and practices. It provides background and context, and shows how your research will contribute to the field. 

A literature review should: 

• Provide a comprehensive and updated review of the literature;
• Explain why this review has taken place;
• Articulate a position or hypothesis;
• Acknowledge and account for conflicting and corroborating points of view

From  S age Research Methods

Purpose of a Literature Review

A literature review can be written as an introduction to a study to:

• Demonstrate how a study fills a gap in research
• Compare a study with other research that's been done

Or it can be a separate work (a research article on its own) which:

• Organizes or describes a topic
• Describes variables within a particular issue/problem

Limitations of a Literature Review

Some of the limitations of a literature review are:

• It's a snapshot in time. Unlike other reviews, this one has beginning, a middle and an end. There may be future developments that could make your work less relevant.
• It may be too focused. Some niche studies may miss the bigger picture.
• It can be difficult to be comprehensive. There is no way to make sure all the literature on a topic was considered.
• It is easy to be biased if you stick to top tier journals. There may be other places where people are publishing exemplary research. Look to open access publications and conferences to reflect a more inclusive collection. Also, make sure to include opposing views (and not just supporting evidence).

Source: Grant, Maria J., and Andrew Booth. “A Typology of Reviews: An Analysis of 14 Review Types and Associated Methodologies.” Health Information & Libraries Journal, vol. 26, no. 2, June 2009, pp. 91–108. Wiley Online Library, doi:10.1111/j.1471-1842.2009.00848.x.

Librarian Assistance

For help, please contact the librarian for your subject area.  We have a guide to library specialists by subject .

• Last Updated: Aug 26, 2024 5:59 AM
• URL: https://guides.lib.utexas.edu/literaturereviews

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• Volume 83, Issue 9
• ASAS consensus definition of early axial spondyloarthritis
• Article Text
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• http://orcid.org/0000-0002-4527-852X Victoria Navarro-Compán 1 , 2 ,
• http://orcid.org/0000-0001-9119-5330 Diego Benavent 1 , 2 ,
• http://orcid.org/0000-0001-9336-0416 Dafne Capelusnik 3 , 4 ,
• http://orcid.org/0000-0002-5781-158X Désirée van der Heijde 5 ,
• http://orcid.org/0000-0002-0577-6620 Robert BM Landewé 6 , 7 ,
• http://orcid.org/0000-0002-4537-6015 Denis Poddubnyy 8 , 9 ,
• http://orcid.org/0000-0001-8477-0683 Astrid van Tubergen 10 , 11 ,
• http://orcid.org/0000-0002-9475-9362 Xenofon Baraliakos 12 , 13 ,
• http://orcid.org/0000-0002-3561-5932 Filip E Van den Bosch 14 , 15 ,
• http://orcid.org/0000-0001-8448-7407 Floris A van Gaalen 5 ,
• http://orcid.org/0000-0001-6314-5336 Lianne Gensler 16 ,
• http://orcid.org/0000-0002-2309-5837 Clementina López-Medina 17 , 18 ,
• http://orcid.org/0000-0002-9683-3407 Helena Marzo-Ortega 19 , 20 ,
• http://orcid.org/0000-0003-2246-1986 Anna Molto 21 , 22 ,
• Rodolfo Pérez-Alamino 23 ,
• http://orcid.org/0000-0001-5445-548X Martin Rudwaleit 24 ,
• Marleen van de Sande 25 ,
• http://orcid.org/0000-0002-9720-0396 Raj Sengupta 26 ,
• http://orcid.org/0000-0001-6701-670X Ulrich Weber 27 ,
• http://orcid.org/0000-0002-8899-9087 Sofia Ramiro 5 , 7
• 1 Rheumatology , La Paz University Hospital , Madrid , Spain
• 2 IdiPAZ , Madrid , Spain
• 3 Universiteit Maastricht Care and Public Health Research Institute , Maastricht , The Netherlands
• 4 Rheumatology , Tel Aviv Sourasky Medical Center , Tel Aviv , Israel
• 5 Rheumatology , Leiden University Medical Center , Leiden , The Netherlands
• 6 Department of Rheumatology & Clinical Immunology , Amsterdam University Medical Centres , Duivendrecht , The Netherlands
• 7 Rheumatology , Zuyderland Medical Centre Heerlen , Heerlen , The Netherlands
• 8 Department of Gastroenterology, Infectious Diseases and Rheumatology , Charite Universitatsmedizin Berlin , Berlin , Germany
• 9 German Rheumatism Research Center , Berlin , Germany
• 10 Maastricht University Care and Public Health Research Institute , Maastricht , The Netherlands
• 11 Rheumatology , Maastricht University Medical Centre+ , Maastricht , The Netherlands
• 12 Rheumatology , Rheumazentrum Ruhrgebiet , Herne , Germany
• 13 Ruhr-Universitat Bochum , Bochum , Germany
• 14 Internal Medicine and Pediatrics , VIB-UGent Center for Inflammation Research , Zwijnaarde , Belgium
• 15 Ghent University , Gent , Belgium
• 16 Medicine, Division of Rheumatology , University of California , San Francisco , California , USA
• 17 Rheumatology , Reina Sofia University Hospital , Cordoba , Spain
• 18 Maimonides Biomedical Research Institute of Cordoba , Cordoba , Spain
• 19 Rheumatology , Leeds Biomedical Research Centre , Leeds , UK
• 20 University of Leeds Leeds Institute of Rheumatic and Musculoskeletal Medicine , Leeds , UK
• 21 APHP, INSERM U-1158, Rheumatology , Hospital Cochin , Paris , France
• 22 Center of Research in Epidemiology and Statistics Sorbonne Paris Cité , Paris , France
• 23 Rheumatology , Avellaneda Hospital , Tucuman , Argentina
• 24 Internal Medicine and Rheumatology , Klinikum Bielefeld Rosenhohe , Bielefeld , Germany
• 25 Department of Rheumatology and Clinical Immunology , University of Amsterdam , Amsterdam , The Netherlands
• 26 Rheumatology , Royal National Hospital for Rheumatic Diseases , Bath , UK
• 27 Practice Buchsbaum, Rheumatology , Schaffhausen Hospitals , Schaffhausen , Switzerland
• Correspondence to Dr Victoria Navarro-Compán; mvictoria.navarroc{at}gmail.com

Objectives To develop a consensual definition for the term ‘early axial spondyloarthritis—axSpA’—and ‘early peripheral spondyloarthritis—pSpA’.

Methods The ASAS (Assessment of SpondyloArthritis international Society-Spondyloarthritis EARly definition) steering committee convened an international working group (WG). Five consecutive steps were followed: (1) systematic literature review (SLR); (2) discussion of SLR results within the WG and ASAS community; (3) a three-round Delphi survey inviting all ASAS members to select the items that should be considered for the definition; (4) presentation of Delphi results to the WG and ASAS community and (5) ASAS voting and endorsement (2023 annual meeting).

Results Following the SLR, consensus was to proceed with an expert-based definition for early axSpA (81% in favour) but not for pSpA (54% against). Importantly, early axSpA should be based on symptom duration taking solely axial symptoms into account. 151–164 ASAS members participated in the Delphi surveys. Consensus was achieved for considering the following items within early axSpA definition: duration of symptoms ≤2 years; axial symptoms defined as cervical/thoracic/back/buttock pain or morning stiffness; regardless of the presence/absence of radiographic damage. The WG agreed that in patients with a diagnosis of axSpA ‘early axSpA’ should be defined as a duration of ≤2 years of axial symptoms. Axial symptoms should include spinal/buttock pain or morning stiffness and should be considered by a rheumatologist as related to axSpA. The ASAS community endorsed this proposal (88% in favour).

Conclusions Early axSpA has newly been defined, based on expert consensus. This ASAS definition should be adopted in research studies addressing early axSpA.

• Spondylitis, Ankylosing
• Outcome Assessment, Health Care

https://doi.org/10.1136/ard-2023-224232

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Handling editor Josef S Smolen

X @annamolto, @sofiaramiro82

Contributors VN-C and SR designed the study and developed the study protocol. DB and DC performed the survey and summarised the data. All authors participated actively in the project. VN-C and SR wrote the first draft of the manuscript. All authors critically reviewed the manuscript for important intellectual contribution and approved the final version.

Funding The Assessment of SpondyloArthritis international Society (ASAS) funded Diego Benavent to work on this project.

Competing interests VN-C: Speaker fees—AbbVie, Eli Lilly, Janssen, MSD, Novartis, Pfizer, UCB Pharma; Consultancy fees- AbbVie, Eli Lilly, Galapagos, MoonLake, MSD, Novartis, Pfizer, UCB Pharma; Grants: AbbVie, Novartis. DB: Grant/research support from Novartis, and speaker fees from Janssen, Abbvie, and Galapagos. DvdH: Consulting AbbVie, Bayer, BMS, Cyxone, Eisai, Galapagos, Gilead, Glaxo-Smith-Kline, Janssen, Lilly, Novartis, Pfizer, UCB Pharma. Director of Imaging Rheumatology bv. RBML: Consulting AbbVie, Eli-Lilly, Janssen, Galapagos, Gilead, Novartis, Pfizer, UCB. Director of Rheumatology Consultancy BVD. DP: Research grant from AbbVie, Eli Lilly, MSD, Novartis, Pfizer, Consultation AbbVie, Biocad, BMS, Eli Lilly, Gilead, MSD, Novartis, Pfizer, Samsung Bioepis, UCB, Speaker AbbVie, BMS, Lilly, MSD, Novartis, Pfizer, UCB. AvT: Speaker fees: Pfizer; Consulting fees: Novartis, Galapagos, UCB; Grants: Pfizer, UCB, Novartis XB: Abbvie, Amgen, Chugai, Eli Lilly, Galapagos, Janssen, MSD, Novartis, Pfizer, Roche, Sandoz, UCB. FEVdB: received speaker and/or consultancy fees from AbbVie, Amgen, Eli Lilly, Galapagos, Janssen, Moonlake, Novartis, Pfizer and UCB FAvG: Research Grants—Novartis; consultancy -MSD, AbbVie, Novartis and BMS LG: Research grants UCB, Novartis, Consulting fees AbbVie, Acelyrin, Eli Lilly, Fresenius Kabi, Janssen, Novartis, Pfizer, UCB Pharma CL-M: Speaker fees AbbVie, Eli Lilly, Novartis, Janssen, UCB Pharma. Consulting fees Eli Lilly, Novartis, UCB Pharma. HM-O: Speaker fees/consultancy: ABvie, Eli-Lilly, Janssen, Moonlake, Novartis, Pfizer and UCB. Research grants from Janssen, Novartis and UCB. AM: Consulting fees AbbVie, Biogen, BMS, Cyxone, Eisai, Galapagos, Gilead, Janssen, Lilly, Novartis, Pfizer, UCB Pharma. Grants: UCB RP-A: Speaker fees Abbvie, Eli Lilly, Novartis, Janssen, Pfizer. Consulting fees Abbvie, Eli Lilly, Janssen, Novartis. MR: Speaker- AbbVie, Boehringer Ingelheim, Eli Lilly, Janssen, Novartis, UCB Pharma; Consultancy AbbVie, Eli Lilly, Novartis, Pfizer, UCB Pharma MvdS: Speaker -Janssen, Novartis, UCB; Consultancy Abbvie, Eli Lilly, Novartis, UCB; Research Grants: Eli Lily, Novartis, UCB RS: Speaker - AbbVie, Biogen, Eli Lilly, MSD, Novartis, UCB; Consultancy—AbbVie, Eli Lilly, Novartis, Pfizer, UCB. Grants: AbbVie, Novartis, UCB UW: Speaker fees NovartisS. SR: Research Grants—AbbVie, Galapagos, MSD, Novartis, Pfizer, UCB; consultancy—AbbVie, Eli Lilly, MSD, Novartis, Pfizer, Sanofi, UCB.

Provenance and peer review Not commissioned; externally peer reviewed.

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2. materials and methods, 2.1. study design and setting, 2.2. population and data sources, 2.3. administrative coding algorithm, 2.4. “gold-standard” definition of ahi, 2.5. data abstraction, 2.6. outcomes, 2.7. statistical analysis, 3.2. npv, sn, and sp, 4. discussion, 4.1. main findings, 4.2. results in relation to other studies, 4.3. strengths and limitations, 5. conclusions, author contributions, institutional review board statement, informed consent statement, data availability statement, acknowledgments, conflicts of interest, abbreviations.

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Baassiri, H.; Varghese, T.; Clemens, K.K.; Ouédraogo, A.M.; Van Aarsen, K.; Vujčić, B.; Yan, J.W. Validity of an ICD-10 Coding Algorithm for Acute Heat Illness in the Emergency Department: A Retrospective Cohort Study. Int. J. Environ. Res. Public Health 2024 , 21 , 1132. https://doi.org/10.3390/ijerph21091132

Baassiri H, Varghese T, Clemens KK, Ouédraogo AM, Van Aarsen K, Vujčić B, Yan JW. Validity of an ICD-10 Coding Algorithm for Acute Heat Illness in the Emergency Department: A Retrospective Cohort Study. International Journal of Environmental Research and Public Health . 2024; 21(9):1132. https://doi.org/10.3390/ijerph21091132

Baassiri, Hasan, Timothy Varghese, Kristin K. Clemens, Alexandra M. Ouédraogo, Kristine Van Aarsen, Branka Vujčić, and Justin W. Yan. 2024. "Validity of an ICD-10 Coding Algorithm for Acute Heat Illness in the Emergency Department: A Retrospective Cohort Study" International Journal of Environmental Research and Public Health 21, no. 9: 1132. https://doi.org/10.3390/ijerph21091132

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