Preiss, Julian
Routledge, 2013
Buku Teks
Reulet, Anibal Sanchez
University of Mexico Press, 1954
Buku Teks
Hales, Steven D.
Wiley Balckwell, 2013
Buku Teks
Maritain, Jacques, 1882-1973
Rowman & Littlefield Publishers, 2005
Buku Teks
Randall, John Herman
Barnes & Noble, 1957
Buku Teks