Morley, Neville, author
Wiley-Blackwell, 2009
Buku Teks
Council for Research in Values and Philosophy, 2005
Buku Teks
Huntington, Samuel P., author
Simon & Schuster, 2005
Buku Teks
Guibernau, Montserrat
Malden, Mass. : Polity, 2013
Buku Teks
Shapiro, Ian, author
Yayasan Obor Indonesia, 2006
Buku Teks