Dyfyniad APA

Lefton, L. A. (1994). Psychology (5th.ed.). Allyn and Bacon.

Dyfyniad Arddull Chicago

Lefton, Lester A. Psychology. 5th.ed. Boston: Allyn and Bacon, 1994.

Dyfyniad MLA

Lefton, Lester A. Psychology. 5th.ed. Allyn and Bacon, 1994.

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