Brown, John Seely
Harvard Business School Press, 2000
Buku Teks
Brown, John Russell
Routledge , 1999
Buku Teks
Harvard Business Review Book, 1988
Buku Teks
Mackenizie, John
Illinois: Dow Jones-Irwin, 1989
Buku Teks
Brown, Harrison
The Viking Press , 1963
Buku Teks