Saifuddin Azwar
Pustaka Pelajar, 1995
Buku Teks
Mar`at, author
Ghalia Indonesia, 1984
Buku Teks
Ibadurrahman, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)
Dede Andarso, author
1985
UI - Skripsi (Membership)
F.X. Sigit Eko Widyananto, author
1988
UI - Skripsi (Membership)