Hick, John H., 1922-2012
Prentice-Hall, 1990
Buku Teks
Farrington, Karen
Chancellor Pres, 1998
Buku Referensi
Pojman, Louis P.
English : 6th ed., International ed., 2012
Buku Teks
Buku Teks
edited by John K. Ryan
The Catholic University of America Press, 1963
Buku Teks