Bernheim, Ruth Gaare, author
JonesBartlett Learning, 2015
Buku Teks
Miller, Seumas, author
Blackwell Publishing, 2009
Buku Teks
edited by Tinatin Bocorivili; Sweet William; Daniel Ahern
Council for Research in Values and Philosophy, 2005
Buku Teks
Collins, Denis, author
John Wiley & Sons, 2009
Buku Teks
Paine, Lynn Sharp
Irwin, 1997
Buku Teks