Artikel Jurnal
edited by William O`Donohue and Kyle Ferguson
Sage, 2003
Buku Teks
Roth, Philip, author
Vintage Books, 1997
Buku Teks
Ari Kartika Dewa, author
Universitas Indonesia, 1988
UI - Skripsi (Membership)
Naisaban, Ladislaus
Grasindo, 2004
Buku Teks