edited by Bert Weltens, Kees de Bot and Theo van Els
Foris Publications, 1986
Buku Teks
Meleis, Afaf Ibrahim, author
Lippincott , 1997
Buku Teks
edited by Robert N. Bellah
Free Press, 1965
Buku Teks
Aitchison, Jean, 1938-, author
Cambridge University Press, 1995
Buku Teks
Sakharov, Andrei D.
Norton & Company, 1968
Buku Teks