Dyfyniad APA

Peterson, C. (1997). Psychology: A biopsychosocial approach (2nd ed.). Longman.

Dyfyniad Arddull Chicago

Peterson, Christopher. Psychology: A Biopsychosocial Approach. 2nd ed. New York: Longman, 1997.

Dyfyniad MLA

Peterson, Christopher. Psychology: A Biopsychosocial Approach. 2nd ed. Longman, 1997.

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