APA citation style was created by the American Psychological Association. It is commonly used for citing sources in the Social Sciences, which includes: Anthropology, Business, Communication studies, Education, Ethnic studies, Law, Political studies, Psychology, Sociology, etc.
Publication Manual of the American Psychological Association by 
Concise Rules of APA Style by ![University of Idaho Library [logo]](https://www.lib.uidaho.edu/media/images/ui_library_horizontal.png)