Waite, Stephen, author
Prentice-Hall, 2000
Buku Teks
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
Kennedy, Gavin, author
Harvard Business School Press, 994
Buku Referensi
Hindle, Tim, author
Harvard Business, 1993
Buku Referensi