Windolph, F. Lyman
Princeton University press, 1951
Buku Teks
Finnis, John, author
Oxford Univesity Press, 2011
Buku Teks
Maritain, Facques
Charles Scribner's Son's, 1943
Buku Teks
Dentreves, A.P., author
Hutchinson`s University Library, 1951
Buku Teks
Anderson, Owen J., author
Cambridge University Press, 2012
Buku Teks