The four parts of a review of related literature and studies are: 1) Introduction, 2) Synthesis of Sources, 3) Findings, and 4) Conclusions. The introduction provides an overview of the topic and the purpose of the review. The synthesis of sources involves summarizing and synthesizing the literature and studies related to the topic. The findings section presents the results of the review and any patterns or trends that were identified. Finally, the conclusions section summarizes the review and provides recommendations for further research.