Traditional or narrative literature reviews are typically broad in scope. They cover as much as possible of the existing literature or research on a given topic or subject. Often, this sort of literature review is included in theses and dissertations written for degree credit at universities. They're written as an essential part of the theoretical framework for the thesis or dissertation writer's argument: here's what's known, here's what's not known, here's what my work needs to answer and will answer. Because they describe what's known and not, their focus tends to be descriptive rather than analytical.
A systemic or systematic literature review is hard to define. Depending on the discipline or the field of study, systematic literature reviews can be many different things. Essentially, systematic literature reviews are created with carefully selected resources which are themselves chosen based on a predetermined selection criteria. In contrast, the traditional or narrative literature review examines all available resources in a particular discipline and is created with any and all resources that the investigator deems relevant.
The quality of the resources to be included in a systematic review is an important part of the decision to include resources in the systematic review. In other words, the author may choose to include or exclude a resource depending on an assessment of the validity of the resource.
From Cochrane Handbook for Systematic Reviews of Interventions version 6.2 (updated February 2021). Cochrane, 2021. Available from www.training.cochrane.org/handbook.
A critical literature review has two main purposes:
Because a traditional or narrative literature review is so often a part of a thesis or dissertation, it's good to look at dissertations to find examples of literature reviews. The following links will take you to dissertations with literature reviews; check the tables of contents to find the literature reviews within the dissertations. They're usually the second chapter of the dissertation.
Coleman, B. N. (2015). The association between electronic cigarette use and cigarette smoking behavior among young adults in the United States (Publication no. 3712206). University of Maryland, College Park. ProQuest Dissertations Publishing.
Chan, G. C. K., et al. (2021). Gateway or common liability? A systematic review and meta-analysis of studies of adolescent e-cigarette use and future smoking initiation. Addiction, 116(4), 743-756. https://doi.org/10.1111/add.15246
Patel, S., et al. (2020). A systematic review of the impact of cigarettes and e-cigarettes in otology. Journal of Laryngology and Otology, 134(11), 951-956. https://doi.org/10.1017/S0022215120002315
Piontak, J. R. (2013). Childhood obesity and place: Poverty, race, and food access (Order No. 3575651). Available from Ethnic NewsWatch; ProQuest Dissertations & Theses A&I. (1459461015). Retrieved from https://www.proquest.com/dissertations-theses/childhood-obesity-place-poverty-race-food-access/docview/1459461015/se-2?accountid=14515
Haspett, L. A. (2003). Community mental health nurses' perceptions of their elderly client's health problems related to alcohol use/abuse (Order No. 1415311). Available from ProQuest Dissertations & Theses A&I. (305232577). Retrieved from https://www.proquest.com/dissertations-theses/community-mental-health-nurses-perceptions-their/docview/305232577/se-2?accountid=14515