Baskinger, Mark, author
Watson-Guptill Publications, 2013
Buku Referensi
Miranti Susilowati, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Tesis (Open)
Day, Robert A., author
ISI Press, 1979
Buku Referensi
Endah Setyarini, author
Fakultas Psikologi Universitas Indonesia, 2015
UI - Tesis (Membership)
Dian Juniar Amellya, author
Universitas Indonesia, 2015
UI - Tesis (Membership)