Artikel Jurnal
Barus, Septalina Manullang, author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis (Membership)
Marthen Pali, author
1990
UI - Tesis (Membership)
Unggul Widiyo Saputro, author
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis (Membership)
M.G. Yulistin P., author
Fakultas Psikologi Universitas Indonesia, 2002
UI - Tesis (Membership)