Please find a list of the most commonly referenced and used style guides below. Consult your course syllabus or talk with your professor about the citation style that is required for a given class. The American Psychological Association (APA) style guide is utilized predominantly by individuals in the social sciences, while the Modern Language Association (MLA) style guide is preferred by those in the humanities. Although the Chicago Manual of Style is used less frequently by programs geared towards the humanities, sometimes history majors are required to use this citation style. Lastly, the Associated Press (AP) publishes a guide just for journalists.