Tumin, Melvin M., author
Prentice-Hall, 1967
Buku Teks
edited by Peter M. Blau
Open Books, 1976
Buku Teks
Junsuke Hara, author
Trans Pacific Press, 2005
Buku Teks
edited by Reinhard Bendix, Seymour Martin Lipset
Free Press, 1953
Buku Teks
Berreman, Gerald D., author
Centre for Strategic and International Studies, [1972]
Buku Teks