Dampier, William Cecil
Cambridge University Press, 1989
Buku Teks
Hick, John H., 1922-2012, author
Prentice-Hall, 1990
Buku Teks
Farrington, Karen, author
Chancellor Pres, 1998
Buku Referensi
Pojman, Louis P.
English : 6th ed., International ed., 2012
Buku Teks
Buku Teks