Riccardo Manzini, editor
[, Springer], 2012
eBooks
Carlson, Rick
The Mosby , 1987
Buku Teks
Chopra, Sunil, 1960-
Prentice-Hall, 2001
Buku Teks
Neef, Dale
[American Management Association, ], 2004
eBooks
Christopher, Martin
Prentice-Hall, 2005
Buku Teks