Fakultas Psikologi Universitas Indonesia, 2014
UI - Skripsi (Membership)
Gugun Gumilang, author
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Osborne, John W.
Bumi Aksara, 1994
Buku Teks
The population council, 1984
Buku Teks
Danelius, Hans
The Swedish Institute, 1981
Buku Teks