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