Eyet Hidayat, author
Universitas Indonesia, 2011
UI - Tesis (Open)
Bien, Thomas, author
Wisdom Publications, 2006
Buku Teks
James, Muriel.
Addison-Wesley Pub. Co, 1977
Buku Teks
Mirjam L. Aryanto, author
1992
UI - Skripsi (Membership)
Ellis, Albert, author
Grasindo, 2005
Buku Teks