Edie, Carlene J.
Wadsworth/Thomson Learning, 2003
Buku Teks
Quigley, Harold S.
University of Minnesota Press, 1956
Buku Teks
by Steven L. Spiegel [and others]
Thomson Wadsworth, 2005
Buku Teks
McDougall, Derek
Lynne Rienner , 1997
Buku Teks
Kymlicka, Will
Oxford University Press, 2007
Buku Teks