Tambunan, Raymond A.I., author
1997
UI - Skripsi (Membership)
Loethano Novi Syukriadi, author
1998
UI - Skripsi (Membership)
Jelajah, 2 (1992) : 18-36, 1992
Artikel Jurnal
Alifah Abdullah, author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis (Membership)
Mellia Christia, author
2001
UI - Skripsi (Membership)