Martin A.Finkel, Angelo P.Giardino
Sage Publications, 2001
Buku Teks
Jon R. Conte, editor
Sage Publications, 2002
Buku Teks
Merrell, Kenneth W.
Routledge, 2007
Buku Teks
Kurnia Widianti
Fakultas Psikologi Universitas Indonesia, 2004
UI - Skripsi (Membership)
Mussen, Paul H.
Prentice-Hall, 1969
Buku Teks