Harvard Business School Press, 2004
Buku Teks
Petras, Kathryn
Avon Book , 1999
Buku Teks
edited by Jeana Wirtenberg
American Management Association, 2009
eBooks
Kotter, John P., 1947-, author
Harvard Business School Press, 2002
Buku Teks
Lee, Grossman, author
Amacom, 1974
Buku Teks