Charron, C. G.
Macmillan, 1976
Buku Teks
Fogg, C. Davis
AMACOM, American Management Association, 1994
Buku Teks
Mina, Eli, author
[American Management Association;, ], 2002
eBooks
Payne, Vivette, author
[American Management Association;, ], 2001
eBooks
Johnson, David W., 1940-, author
Prentice-Hall, 1987
Buku Teks