The review of literature for a research paper must undergo very meticulously created foregrounds to meet the research purpose. The most efficient way to write a review of literature is to have a determined aim and purpose of the research. As you gain the right purpose and aim of the research, the database search as on – EBSCOHost, Google Scholar, ProQuest, The Lancet, Elsevier, Sage, JSTOR; for relevant articles and secondary sources becomes very clear.