Weinberger, Paul E.
Macmillan, 1969
Buku Teks
Greenwald, Michael L.
Longman, 2002
Buku Teks
edited by S.N. Eisenstadt
Little, Brown and Company, 1968
Buku Teks
Deutsch, Morton
Yale University Press, 1985
Buku Teks
McMichael, Philip, 1947-
Sage, 2012
Buku Teks