[publisher not identified], [date of publication not identified]
Naskah
Silaban, D. Rismawati, author
Fakultas Psikologi Universitas Indonesia, 1992
UI - Skripsi (Membership)
Ricci Vicika, author
1997
UI - Skripsi (Membership)
Siagian, Eva Grace Rouli, author
2002
UI - Skripsi (Membership)
Evana Patrisia, author
2004
UI - Skripsi (Membership)