Hill, Charles W. L., author
Houghton Miffiln, 2001
Buku Teks
Hill, Charles W. L., author
Houghton Miffiln, 1998
Buku Teks
Hill, Charles W. L., author
Houghton Mifflin , 1989
Buku Teks
Gannon, Martin J., author
Little, Brown & Co., 1982
Buku Teks
Torgersen, Paul E., author
Prentice-Hall, 1972
Buku Teks