Johnson, Simon, author
McGraw-Hill, 2004
Buku Teks
Weiss, Donald H., author
[American Management Association, ], 2004
eBooks
Fenvessy, Stanley J.
Dowjones-Irwin, 1976
Buku Teks
Hahn, Fredrick, author
American Management Association;, 2009
eBooks
Baveystock, Sacha, author
Prentice Hall Life, 2007
Buku Teks