Dyfyniad APA

American, P. A. (2011). Publication Manual of the american psycological association. APA.

Dyfyniad Arddull Chicago

American, Psychological Association. Publication Manual of the American Psycological Association. APA, 2011.

Dyfyniad MLA

American, Psychological Association. Publication Manual of the American Psycological Association. APA, 2011.

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