Hales, Steven D.
Wiley Balckwell, 2013
Buku Teks
Maritain, Jacques, 1882-1973
Rowman & Littlefield Publishers, 2005
Buku Teks
Flew, Antony
Thames and Hudson , 1989
Buku Teks
Brennan, Joseph Gerard
Harper & Row, 1967
Buku Teks
edited by John Cottingham
Blackwell, 2008
Buku Teks