Netti, Frank L.
McGraw-Hill, 2003
Buku Teks
Egan, Mike, author
McGraw-Hill, 2012
Buku Teks
Novianthi Dian Purnamawati, author
Fakultas Psikologi Universitas Indonesia, 2007
UI - Skripsi Membership
Hepner, Harry W.
McGraw-Hill, 1969
Buku Teks
Indah Sulistyorini, author
Fakultas Psikologi Universitas Indonesia, 2000
UI - Skripsi (Membership)