Stettner, Morey, author
McGraw-Hill, 2000
Buku Teks
Cadwell, Charles M., author
[American Management Association, ], 2004
eBooks
Caroselli, Marlene
McGraw-Hill, 2000
Buku Teks
Ellis, Carol W., author
[American Management Association, ], 2005
eBooks
Ciampa, Dan
Harvard Business School Press, 1999
Buku Teks