The University Of Michigan Press, 1999
Buku Teks
Common, Michael
Addison Wesley Longman, 1996
Buku Teks
Coplin, William D.
Duxbury Press, 1974
Buku Teks
Wright, Chester
Addison-Wesley, 1973
Buku Teks
Bach, George Leland
Prentice Hall of India, 1977
Buku Teks