Halverson, william H
Random House, 1969
Buku Teks
Losee, John, author
Oxford University Press, 1980
Buku Teks
Hales, Steven D., author
Wiley Balckwell, 2013
Buku Teks
Maritain, Jacques, 1882-1973, author
Rowman & Littlefield Publishers, 2005
Buku Teks
Luce, J.V.
Thames and Hudson , 1994
Buku Teks