Outhwaite, William, author
Blackwell, 2006
Buku Teks
edited by Patrick Baert, Sokratis M. Koniordos, Giovana Procacci, Carlo Rizza
Routledge Kegan Paul, 2010
Buku Teks
Elliott, David, author
Routledge, 1997
Buku Teks
The Council for Research in Values and Philosophy, 2005
Buku Teks
Kumar, Krishan, author
Blackwell, 1996
Buku Teks