M.G. Yulistin P., author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis (Membership)
McLeod, John, author
Kencana, 2003
Buku Teks
Lubis, Namora Lumongga, author
Kencana Prenada Media Group, 2011
Buku Teks
Marthen Pali, author
1990
UI - Tesis (Membership)
Matius Suparmoko, author
BPFE, 1999
Buku Teks