Gaya APA
Nash, P, W., Bernstein, D, A. (1989).
Essentials of Psychology .
United State of Amerika:
Houghton Mifflin Company.
Gaya MLA
Nash, Peggy, W., Bernstein, Douglas, A.
"Essentials of Psychology".
United State of Amerika:
Houghton Mifflin Company,
1989.
Text.