Cambridge University Press, 1997
eBooks
edited by Tinatin Bocorivili; Sweet William; Daniel Ahern
Council for Research in Values and Philosophy, 2005
Buku Teks
Lentera Abadi, 2010
Buku Referensi
Beyme, Klaus Von, author
Springer, 2014
Buku Teks
Sheldon Anderson ... [and others]
Westview Press, 2015
Buku Teks