Christian, James L. , author
Wadsworth and Cengage Learning, 2012
Buku Teks
Eldridge, Richard, author
Cambridge, 2003
Buku Teks
Davies, Stephen, 1950-, author
Wiley Blackwell, 2016
Buku Teks
Hales, Steven D., author
Wiley Balckwell, 2013
Buku Teks
Maritain, Jacques, 1882-1973, author
Rowman & Littlefield Publishers, 2005
Buku Teks