edited by Robert C. Scharff
Blackwell, 2005
Buku Teks
edited by John Cottingham
Blackwell, 2008
Buku Teks
Pojman, Louis P.
English : 6th ed., International ed., 2012
Buku Teks
Cambridge University Press , 2008
Buku Teks
edited by Constantine Sandis, Jonathan Dancy
Wiley Blackwell, 2015
Buku Teks