Remington, Thomas F., 1948-
Pearson Longman, 2012
Buku Teks
Kemper, Michael, edited, Motika, Raoul, edited, Reichmuth, Stefan, edited
Routledge, 2010
Buku Teks
Dean, Vera Micheles
Harvard University Press, 1948
Buku Teks
Sorokin, Pitirim A.
E. P. Dutton and Company, Inc., 1944
Buku Teks
Hunter, Shireen
M.E. Sharpe, 2004
Buku Teks