APA style is set forth in Publication Manual of the American PsychologicalAssociation, 4th ed. (1994). The APA reference style and similar styles are the mostcommonly used citation formats. The Council of Biology Editors,for example, recommends two citation systems, an in-text number system (see Guidelines for APA Parenthetical Citation Copyright ©2001 The McGraw-Hill Companies. Any use is subject to the Terms of Use and Privacy Policy. McGraw-Hill Higher Education is one of the many fine businesses of ![]()
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