Hindle, Tim
Harvard Business, 1993
Buku Referensi
chief contributor, Tim Hindle ; edited with an introduction by. Margaret Lawrence
Harvard Business School Press, 1994
Buku Referensi
chief contributor, Tim Hindle ; edited by Alistair D. Williamson
Harvard Business School Press, 1994
Buku Referensi
Keen, Peter G.W.
Harvard Business School Press, 1995
Buku Referensi
Faguet, Dmitri
John Wiley & Sons, 2003
Buku Teks