Lynch, James J., author
Macmillan, 1995
Buku Teks
Thomas, Wayne M., author
Amacom, 2008
Buku Teks
Thomas, Wayne M., author
Amacom, 2008
eBooks
Sant, Tom, author
American Management Association, 2006
eBooks
Farber, Barry J., author
Entrepreneur Press, 2013
Buku Teks