Hamstra, Bruce, author
St. Martin's Press, 1994
Buku Teks
Lytle, Chris, author
[American Management Association;, ], 2000
eBooks
Lytle, Chris, author
[American Management Association;, ], 2012
eBooks
Weinstein, David A., author
John Wiley & Sons, 1987
Buku Teks
Moss, Stephen R., author
Prentice-Hall, 2001
Buku Teks