Etzel, Michael J., author
McGraw-Hill, 2004
Buku Teks
Phillips, Charles F., author
Boston , Houghton Mifflin
Buku Teks
by Roger A. Kerin ... [and others]
McGraw-Hill, 2002
Buku Teks
Berkowitz, Eric N., author
Times Mirror/Mosby College, 1986
Buku Teks
McDonald, Malcolm HB.
Pertja Jakarta, 1986
Buku Teks