Christiany
2004
UI - Skripsi (Membership)
Faiza Ratna Umaro
2015
UI - Skripsi (Membership)
Affinito, Mona Gustafson
New Harbinger Publications, Inc, 1999
Buku Teks
Dimas Budi Prasetyo
Fakultas Psikologi Universitas Indonesia, 2009
UI - Skripsi (Open)
Laura Bernadeth
2004
UI - Skripsi (Membership)