by Thomas W. Dunfee [and others]
McGraw-Hill, 1996
Buku Teks
Ginger, Laura A.
Irwin , 1989
Buku Teks
Miller, Roger LeRoy
West Publishing , 1997
Buku Teks
by Jane P. Mallor [and others]
Mc. Irwin/McGraw-Hill, 1998
Buku Teks
Twomey, David P.
Thomson Learning, 2002
Buku Teks