Quible, Zane K., author
Prentice-Hall, 1996
Buku Teks
Bailey, Edward P., author
Prentice-Hall, 2002
Buku Teks
Pugh, David G., author
American Management Association;, 2005
eBooks
Sant, Tom, author
American Management Association, 2008
eBooks
Holt, Rinehart and Winston of Canada, Limited, 1988
Buku Teks