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Proper APA format for sources with three to six authors requires listing the last names of all authors the first time you cite the source as well as the publication date. ...results indicated a strong positive correlation between the two variables (Robsen, Hutchkins, Ru, & Selanis, 1989).
APA formatting for a works cited list orders sources alphabetically by authorsâ last names and indents after the first line of each source. A space should be included between each entry. The general format of a book entry in APA style is: Authorâs last name, First initials. (Date of publication).