A pocket style manual by 
The American Psychology Association (APA) is designed for the social & life sciences (e.g. psychology, anthropology, medicine).
The APA style manual proscribes 2 different sets of rules: one for IN TEXT citations, and the other for the REFERENCE LIST (which appears only at the end of your work). The examples shown below are for both formats and come from the newest version of this APA style manual, the 7th edition, published in 2020.
Publication Manual of the American Psychological Association by 