This document provides an overview of APA and MLA citation styles. Both styles require in-text citations and a references or works cited page at the end. The main differences are that APA style uses the author's last name and year of publication in parentheses for in-text citations, while MLA style uses the author's name and page number. The document also notes when each citation style is commonly used, with APA for social sciences and business, and MLA for humanities subjects. Examples of each style are provided.