Joseph Maier, Richard W.Weatherhead
F. A. Praeger, 1964
Buku Teks
Frak, Andre Gunder
Monthley Review Press, 1972
Buku Teks SO
Thurber, Glarence E
Duke University Press, 1973
Buku Teks
edited by Howard J. Wiarda, Harvey F. Kline
Westview Press, 2007
Buku Teks
Wynia, Gary W.
Cambridge University Press , 1984
Buku Teks