Posavac, Emil J.
Prentice Hall Inc., 1980
Buku Teks
Epstein, Irwin, author
Columbia Univ. Press, 1977
Buku Teks
King, Jean A., author
Sage, 1987
Buku Teks
Tika Bisono, author
Fakultas Psikologi Universitas Indonesia, 2004
UI - Tesis Membership
Anderson, Scarvia B., author
Jossey-Bass, 1978
Buku Teks