Turri, John
John Wiley & Sons, 2014
Buku Teks
edited by Ben Kotzee
Wiley-Blackwell, 2014
Buku Teks
Rescher, Nicholas
State University of New York Press, 2003
Buku Teks
Audi, Robert
Routledge, 2011
Buku Teks
Edited by Michael Huemer
Routledge, 2002
Buku Teks