Dyfyniad APA

Publication Manual. (1983). Publication manual of the American Psychological Association (3rd.). American Psychological Association.

Dyfyniad Arddull Chicago

Publication Manual. Publication Manual of the American Psychological Association. 3rd. Washington, DC: American Psychological Association, 1983.

Dyfyniad MLA

Publication Manual. Publication Manual of the American Psychological Association. 3rd. American Psychological Association, 1983.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.