Levinson, Nan, author
[American Management Association;, ], 2000
eBooks
Linsenman, Ciree, author
Ep. Entrepreneur Press, 2011
Buku Teks
Skrob, Robert, author
Entrepeneur Press, 2013
Buku Teks
Harvard Business School Press, 2004
Buku Teks
Hawkins, Barrie, author
Piatkus, 1993
Buku Teks