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