Lewis, James P., author
Amacom, 1997
Buku Teks
Hirt, Geoffrey A., author
McGraw-Hill, 2006
Buku Teks
by John H. Hollenbeck [and others]
McGraw-Hill, 2009
Buku Teks
Globerman, Steven
Prentince-Hall, 1986
Buku Teks
Kraig Knutson, Clifford J. Schexnayder, Christine Fiori, Richard E. Mayo
McGraw-Hill, 2009
Buku Teks