Spear, P. D., & Penrod, S. D. (1988). Psychology perspectives on behavior. John Wiley.
Chicago-čujuhus (17. p.)Spear, Peter D., juo Steven D. Penrod. Psychology Perspectives on Behavior. New York: John Wiley, 1988.
MLA-čujuhus (9. p.)Spear, Peter D., juo Steven D. Penrod. Psychology Perspectives on Behavior. John Wiley, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.