Brown, Dee, author
Bantam Books, 1975
Buku Teks
Happy Zulkarmi, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1988
UI - Skripsi (Membership)
Nicolas S. Witschi, editor
Wiley Balckwell, 2014
Buku Teks
Berube, Allan, author
The Free Press, 1990
Buku Teks
Schlissel, Lillian, author
Schocken Books, 1983
Buku Teks