Dyfyniad APA

Worchel, S., & Shebilske, W. (1989). Psychology: Principles and applications (3rd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Worchel, Stephen, and Wayne Shebilske. Psychology: Principles and Applications. 3rd ed. New Jersey: Prentice Hall, 1989.

Dyfyniad MLA

Worchel, Stephen, and Wayne Shebilske. Psychology: Principles and Applications. 3rd ed. Prentice Hall, 1989.

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