Smith-Hemphill, D.A., author
Amacom, 1999
Buku Teks
Tracy, Brian, author
American Management Association, 2004
eBooks
Tator, Rosemary, author
[American Management Association, ], 2011
eBooks
Fox, Scott C., author
[American Management Association, ], 2012
eBooks
Osborne, Starr C., author
[American Management Association;, ], 2010
eBooks