Brown, Frederick G., author
Dryden Press, 1970
Buku Teks
American Psychological Association, 1985
Buku Teks
edited by Hans F. Crombag and Dato N. De Gruijter
Mouton, 1974
Buku Teks
Muhammad Aji Winata, author
Fakultas Psikologi Universitas Indonesia, 2018
UI - Skripsi Membership
Stanley, Julian C., author
Prentice-Hall, 1972
Buku Teks