Wisner, Franz, author
Serambi Ilmu Semesta, 2012
Buku Teks
Dewi Patri Hartanti, author
Fakultas Psikologi Universitas Indonesia, 1997
UI - Skripsi Membership
Scanzoni, Letha Dawson
McGraw-Hill, 1981
Buku Teks
Then, Debbie
Ikrar Mandriabadi, 2008
Buku Teks
Aprilia Patriani, author
Universitas Indonesia, 2002
UI - Skripsi (Membership)