Lewis, Sherman
Duxbury Press, 1980
Buku Teks
Horowitz, Irving Louis
Duke University Press , 2984
Buku Teks SO
Parenti, Michael
Thomson, 2008
Buku Teks SO
Parenti, Michael
St Martin's press, 1998
Buku Teks SO
Boyte, Harry C
Temple University Press, 1980
Buku Teks