1
by Nino, Carlos Santiago
Published 1993
2
by Spaemann, Robert
Published 1989
3
4
by Pojman, Louis P.
Published 2002
5
by MacKinnon, Barbara.
Published 2000
6
7
by Thiroux,Jacques
Published 1998
8
by Wilson, James Q.
Published 1993
9
10
by Williams,Bernard
Published 1985
11
by Singer, Peter.
Published 1993
12
13
by Quinn J. Michael
Published 2017
14
by Frankena, William K.
Published 1973