Dyfyniad APA

American Psychological Association. (2020). Publication manual of the American psychological association (Seventh edition.). American Psychological Association.

Dyfyniad Arddull Chicago

American Psychological Association. Publication Manual of the American Psychological Association. Seventh edition. Washington, DC: American Psychological Association, 2020.

Dyfyniad MLA

American Psychological Association. Publication Manual of the American Psychological Association. Seventh edition. American Psychological Association, 2020.

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