Merrens, Matthew R., author
John Wiley & Sons, 1998
Buku Teks
Edited by Steven K. Huprich
American Psychological Association, 2015
Buku Teks
Soemarno Soedarsono, author
Elex Media Komputindo, 2006
Buku Teks
Imam Lukman Putra Ardian, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Groth-Marnat, Gary, author
John Wiley & Sons, 1990
Buku Referensi