Hoffer, Eric
Jakarta Yayasan Obor Indonesia 1993,
Buku Teks
Rustam Hadi
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis Membership
Yasti Yulianti, author
Fakultas Psikologi Universitas Indonesia, 2003
UI - Tesis Membership
Rah Madya Handaya, author
2007
UI - Tesis Membership
Mann, Leon
Sydney John Wiley & Sons 1969,
Buku Teks