Schiffman, Susan S.
Academic Press, 1981
Buku Teks SO
edited by Zazie Todd, Brigitte Nerlich, Suzanne McKeown and David D. Clarke
Psychology Press, 2004
Buku Teks SO
Platonov, K.I.
Foreign Languages Publishing House, 1959
Buku Teks SO
edited by Kevin Ford, John R. Hollenbeck, Ann Marie Ryan
American Psychological Association,
Buku Teks SO
Thompson, Richard F.
Harper & Row, 1975
Buku Teks SO