APA Style was developed by the American Psychological Association. The standard citation style guidebook for the fields of business, education, health science, public service, and social science is the Publication Manual of the American Psychological Association, 7th edition, 2019. It is commonly referred to as "The APA Manual".
Two types of citations are included in most research papers: citations within the text of the document and a list of reference citations at the end of the paper.