Martin, William J., author
Brookfield, Vt., USA : Gower,, 1995.
Buku Teks
Castells, Manuel, author
Blackwell, 1996
Buku Teks
Brown, John Seely
Harvard Business School Press, 2000
Buku Teks
Martin, William J., author
Aslib Gower, 1995
Buku Teks
MIT Press, 1999
Buku Teks