Hill, Charles W. L., author
Houghton Miffiln, 1995
Buku Teks
Hill, Charles W. L., author
Houghton Miffiln, 1992
Buku Teks
Hill, Charles W. L., author
Houghton Miffiln, 2001
Buku Teks
Thompson, Arthur A., 1940-, author
Irwin, 1996
Buku Teks
Wheelen, Thomas L., author
Addison-Weley Publishing , 1990
Buku Teks