The American Psychological Association (APA) 2021 Edition is a set of guidelines for writing and formatting research papers in the social sciences. It provides rules for citing sources, structuring papers, and presenting data, ensuring clarity and consistency in academic writing. The guidelines are widely used by students, researchers, and professionals in fields such as psychology, sociology, and education. Key updates in the 2021 Edition include changes to citation formats, such as the use of the DOI in references, and the introduction of inclusive language to promote diversity and respect. These updates aim to enhance the readability and accessibility of scholarly work while maintaining academic integrity.