Burghardt, M. David
Harper & Row, 1978
Buku Teks
Wood, Bernard D.
Addison-Wesley, 1982
Buku Teks
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