edited by Louise Craven
Routledge, 2017
Buku Teks
Brecher, Bob
New York Routledge , 1998
Buku Teks
Karina Andjani, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
edited by Mark D. White
Wiley Blackwell, 2013
Buku Teks
Hubbard, L. Ron, 1911-1986, author
Bridge Publications, Inc., 2012
Buku Referensi