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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 Reference List: Articles - Editorial or No Author Named. For a work with no author named, begin the listing with the title. For an editorial, add the word Editorial in brackets.