Stiegler, Bernard, author
Polity Press, 2014
Buku Teks
Hick, John H., 1922-2012, author
Prentice-Hall, 1990
Buku Teks
edited by Vergilius Ferm
Littlefield, Adam and Co., 1959
Buku Referensi
edited by Vergilius Ferm
Philosophical Library, 1945
Buku Referensi
Farrington, Karen, author
Chancellor Pres, 1998
Buku Referensi