Garland, Eric
American Management Association, 2007
eBooks
Armstrong, J. Scott
John Wiley & Sons, 1985
Buku Teks
Morrell, James
Penguin Books, 1972
Buku Teks
edited by Kenneth D. Lawrence, Ronald K. Klimberg
Emerald, 2016
eBooks
Christensen, Clayton M.
Harvard Business School Press, 2004
Buku Teks