Literature review examples and format: what a finished review looks like

What are the main ways to structure a literature review?

Mainly there are four. Mostly the headings itself show which one a review follows.

Go with thematic unless you have some clear reason not to. Say your synopsis has “Objective 2: to examine the effect of X on Y”. The review then needs one section on X and Y, and the committee members will check for that section.

Mixing two structures is quite normal. Arranging by author is where it goes wrong. Headings like “2.3 Studies by Indian authors” and “2.4 Studies by foreign authors” I still see every year. A chapter cut like that mostly becomes plain summary. If there is a separate framework chapter also, keep theory in the review short.

What does a literature review outline look like for a PhD thesis?

Take one management thesis on remote work and employee well-being in Indian IT firms as example. The topic is made up. The outline, though, is the usual shape scholars bring to a DC or RAC meeting.

1. 2.1 Introduction. Scope, which databases and years you searched, and in what order the sections come. Roughly one page.
2. 2.2 Remote work: definitions and development. Short, roughly by year, and one line about what the pandemic did to this research.
3. 2.3 Theoretical perspectives. Job demands–resources theory plus one competing view, with the studies that applied them to remote work.
4. 2.4 Remote work and job autonomy. First theme. It links to Objective 1.
5. 2.5 Remote work, work–family conflict and well-being. Second theme, tied to Objective 2.
6. 2.6 The role of organisational support. The third theme. This is the proposed moderator.
7. 2.7 Studies in the Indian context. Indian articles and Shodhganga theses, and how their samples are different.
8. 2.8 Summary and research gap. What the evidence shows, where it is thin, and which gap your objectives address.

Sections 2.4 to 2.6 match the objectives one to one. So an examiner can check the coverage within a minute. Keep a section like 2.7 for Indian studies only if your argument needs how they differ. Our PhD thesis structure guide shows where this chapter comes in the full thesis. In a synopsis the same outline gets cut down to a few pages (see the research proposal guide).

Literature review examples: weak summary vs good synthesis in three fields

These passages are only for illustration. Author A, [1] and so on are placeholders, and we made up the findings also. So nobody should cite them as evidence.

Example 1: management (remote work and well-being)

Weak version:

Author A (Year) surveyed 200 IT employees in Pune and found that remote work increased job satisfaction. Author B (Year) interviewed managers in the UK and found that remote workers felt isolated. Author C (Year) carried out a survey in Bengaluru and found that working from home increased work–family conflict for women employees.

Stronger version:

Evidence on remote work and well-being points in two directions, depending on who is studied. Surveys of employees in large IT firms find higher job satisfaction among remote workers (Author A, Year; Author D, Year). Interview studies, on the other hand, report isolation and blurred boundaries between work and home (Author B, Year). Part of this difference may come from method, since a survey gives the average attitude and an interview picks up strain the average hides. Gender is another factor. The only Indian study that separated men and women found work–family conflict rising for women alone (Author C, Year). The satisfaction surveys did not report results by gender, so they could not see this.

Check what changed. Its first line is already a claim, and Author A and Author D sit together since they agree. Then it gives one possible reason for the disagreement. At the end it shows a weakness in the evidence, which already hints at the gap.

Example 2: engineering (fault detection in solar PV plants)

Weak version:

In [1], the authors proposed a threshold method for fault detection. In [2], a random forest model was used and it gave high accuracy. In [3], a CNN with drone thermal imaging was used to find hot spots.

Stronger version:

PV fault detection has moved from fixed thresholds to learned models, though the evidence for learned models is weaker than their accuracy figures suggest. Threshold rules [1] are simple to set up and catch open-circuit faults well, but partial shading also gets flagged by them as a fault. Machine-learning classifiers report much higher accuracy [2]. However, that study trained and tested only on simulated I–V curves, so how it performs in the field under dust, soiling and temperature swings is not known. Image-based methods [3] have been validated in working plants, although they depend on drone surveys that small rooftop installations are unlikely to pay for.

The stronger version tests all three methods against the same question, whether the method works in the field. Because every method is judged on that one question, the passage reads like a review of the field.

Example 3: health (self-care in type 2 diabetes)

Weak version:

Diabetes is a major health problem in India. Many studies have been done on self-care. Author E (Year) found that education improves self-care. Author F (Year) also found that education improves self-care. Author G (Year) found that family support is important.

Stronger version:

In most trials, structured education improves self-care in type 2 diabetes (Author E, Year; Author F, Year; Author H, Year). But all three trials recruited patients from urban hospital clinics, and the education was given by doctors or diabetes educators. This limits what they can tell us about rural patients. The fewer studies of rural patients, mostly cross-sectional, suggest that family support predicts self-care more strongly than knowledge does (Author G, Year). To our knowledge, nobody has yet tested whether community health workers can deliver education that also brings in the family.

The weak version opens with a line every reader already accepts, and after that it repeats the same finding two times. In the stronger version the agreement is used only as a starting point. From there it asks which patients those trials left out. That last line is almost a gap already. To make it a formal one, see our guide on writing a research gap statement will help.

How do you open and close a literature review?

The opening of the chapter gives the scope and the route through the chapter, nothing more. Your argument should not start here. For the remote-work thesis, it could be written like this.

Studies on remote work and employee well-being published from 2010 to 2025 are reviewed in this chapter, mostly on knowledge workers. Sources were located through Scopus, Web of Science and Shodhganga (search terms are given in Appendix A). Section 2.2 traces how remote work has been defined, and Section 2.3 sets out the theoretical perspectives used in this study. Sections 2.4 to 2.6 review the evidence on autonomy, work–family conflict and organisational support. Section 2.7 looks at Indian studies, and Section 2.8 identifies the gap that this study addresses.

Many scholars are starting the review with a paragraph on how important the topic is for the nation. Move it to Chapter 1, where background goes.

In the closing section you pull the themes together and say what nobody has studied yet. One sample is here.

Taken together, the studies reviewed here link remote work with greater autonomy, but its effect on well-being depends on work–family conflict, and that conflict falls more on women. Organisational support appears to soften the conflict in Western samples. No study has tested this in Indian IT firms, where household structures and working hours are different. This study therefore examines whether organisational support moderates the relationship between remote work and well-being among Indian IT employees, and whether that effect differs by gender.

Notice that the last sentence reads almost like an objective. It is written that way deliberately. Can your guide guess the objectives before the next chapter? Then the review has done its work.

What is a literature survey, and how is its format different?

In many Indian engineering and computer science departments the literature review is called a “literature survey”, both in theses and in M.Tech project reports. It is the same chapter, and the differences are mostly in the form. Citations usually follow IEEE style, numbered in square brackets in the order they are first cited (details are in our IEEE formatting guide). Sections are more often arranged by method. Many surveys also add one summary table of earlier researches.

The table cannot take the place of the prose. A very common problem in engineering surveys is a chapter that is nearly all table, with one line under each row such as “[2] used random forest and got good results.” What examiners want is paragraphs like Example 2. The table is only a summary after that.

How do you format a literature review in APA style?

For margins, fonts, spacing and numbering, your university’s thesis format comes first and APA comes after. Whatever your university has not fixed, take from APA 7 as per the points below.

• Put the chapter title as an APA Level 1 heading (centred, bold). Themes come as Level 2 (flush left, bold) and sub-themes as Level 3 (flush left, bold italic). Levels 4 and 5 are mostly not needed in a thesis.
• Several sources for one point go inside one parenthesis, in alphabetical order, with semicolons between them, like (Author A, Year; Author B, Year; Author C, Year).
• Past research is written in the past tense or present perfect (“researchers found” or “researchers have found”). Pick one and keep it same in the whole chapter.
• Double spacing, 1-inch margins and a first-line indent of 0.5 inch, unless your university’s thesis format asks for something else.
• A reference list titled “References”, arranged alphabetically with a hanging indent. Every in-text citation should have a matching entry in that list.

We took the grouped-citation rule from the APA Style page on citing multiple works. The tense advice is in their student paper checklist, which is a PDF.

Our APA 7 formatting guide has more detail. If your department follows Harvard, Chicago or Vancouver, the citation styles comparison shows what changes.