Wright, Chester
Massachusetts Addison-Wesley 1973,
Buku Teks
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, author
Addison-Wesley, 1973
Buku Teks