Barker, Stephen, author
Pearson, 2012
Buku Teks
Cleland, David I., author
McGraw-Hill , 2002
Buku Teks
Newell, Michael W., author
[American Management Association;, ], 2004
eBooks
Bolles, Dennis, author
[American Management Association, ], 2002
eBooks
Bolles, Dennis L., author
American Management Association, 2007
eBooks