Ingram, Robert W.
South-Western College 2001, 2001
Buku Teks
Ingram, Robert W.
South-Western, 2005
Multimedia
Hilton, Ronald W.
McGraw-Hill, 2003
Buku Teks
by Jefferson P. Jones ... [and others]
South-Western Cengage Learning, 2012
Buku Teks
Axson, David A.J.
John Wiley & Sons, 2007
Buku Teks