Gaya APA
Ruch, F, L., Zimbardo, P, G. (1980).
Essentials of psychology and life (10 th ed.).
London:
Scott, Foresman.
Gaya MLA
Ruch, Floyd, L.., Zimbardo, Philip, G..
"Essentials of psychology and life".
10 th ed.
London:
Scott, Foresman,
1980.
Text.