Throughout your document, you should apply the following APA format guidelines: Set page margins in inches on all sides. Double-up all text, including headings. Indent the first line of each. Use an accessible font, for example Times New pt. point. or pt. The APA format is preferred by the American Psychological Association and is typically used in behavioral and social sciences such as psychology, sociology, history, and communication. It is also used in business courses. MLA is the style preferred by the Modern Language Association, and it is most often used in the humanities, in particular. Quotations should always be cited and indicated with ation marks, and you should include a page number indicating where the e occurs in the source. Example: Citation with APA style in-text citation. Evolution is a gradual process which “can only act by very short and very slow stages” Darwin, 1859, p. 510. How citations appear in format depends on citation style, which is a set of rules and conventions established for documenting sources. Citation styles may be defined by an association, such as the Modern Language Association, an MLA publisher, such as University of Chicago Press, or a journal, such as The New England Journal,