Richardon, William J., author
Fordham University Press, 2003
Buku Teks
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
UI - Skripsi (Membership)
Thompson, Janna, author
Routledge, 1998
Buku Teks
Warminski, Andrzej
University of Minnesota Press , 1987
Buku Teks
Titus, Harold H.
merican Book Company, 1957
Buku Teks