There are many different writing styles that are used in different disciplines, but APA style is most commonly used in the social sciences. This style is typically used by writers and students who are writing papers for publication in academic journals. The APA style guide is a set of rules and guidelines for how to format your paper, cite your sources, and create a reference list. The APA style guide is published by the American Psychological Association, and it is the most widely used style guide in the social sciences. If you are writing a paper for publication in an APA–style journal, it is important to follow the APA style guide so that your paper will be formatted correctly and your sources will be properly cited.