Balzhiser, Richard E.
Prentice Hall of India, 1977
Buku Teks
Haberman, William L., 1922-
Boston: Allyn and Bacon, 1980
Buku Teks
Spalding, D.B.
The English Language, 1982
Buku Teks
Cravalho, Ernest G.
Pitman, 1981
Buku Teks
Myers, Glen E.
Prentice-Hall, 1989
Buku Teks