Dyfyniad APA
Spear, P. D., & Penrod, S. D. (1988). Psychology perspectives on behavior. John Wiley.
Dyfyniad Arddull Chicago
Spear, Peter D., and Steven D. Penrod. Psychology Perspectives on Behavior. New York: John Wiley, 1988.
Dyfyniad MLA
Spear, Peter D., and Steven D. Penrod. Psychology Perspectives on Behavior. John Wiley, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.