Crichton, Michael (April 26, 2002). Why Speculate? (Speech). International Leadership Forum. www.michaelcrichton.com. La Jolla, CA. Archived from the original on October 30, 2006.
Crichton, Michael (April 26, 2002). Why Speculate? (Speech). International Leadership Forum. www.michaelcrichton.com. La Jolla, CA. Archived from the original on October 30, 2006.