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