Heeger, Gerald A.
Macmillan, 1974
Buku Teks SO
edited by Howard J. Wiarda, Harvey F. Kline
Westview Press, 2007
Buku Teks SO
[by] Ralph Braibanti [and others] ; edited by Ralph Braibanti.
Duke University Press, 1969
Buku Teks SO
edited by Robert E. Ward
Princeton University Press, 1968
Buku Teks SO
Siffin, William J.
Honolulu, Hawaii, East-West Center Press
Buku Teks