Azar, Betty Schrampfer, 1941-, author
Binarupa Aksara, 1993
Buku Teks
Greenbaum, Sidney
Longman , 1990
Buku Teks
Kaplan, Jeffrey P., author
Prentice Hall International, 1995
Buku Teks
CHalker, Sylvia, author
Clarendon Press, 1994
Buku Referensi
Huddleston, Rodney, author
Cambridge University Press, 1984
Buku Teks