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 Daniel M. Hausman ... [and others]
Cambridge University Press, 1994
Buku Teks
edited by Robert C. Scharff, Val Dusek
Wiley Blackwell, 2014
Buku Teks