1. DuPont: From the banks of the Brandywine to miracles of science, DuPont Publishing, St. Petersburg, FL , 2002.
2. , letter to his father, 1808. (Source: Hagley Museum and Library, Wilmington, DE)
3. Attention to safety has significant benefits, Sunday News Journal, Nov. 2, 1986. (Source: Hagley Museum and Library, Wilmington, DE)
4. Achieving excellence in process safety and risk management, Proc Managing Safety & Health in the Workplace, Chicago, IL, June 13-14, 1994.
5. , and , Two hundred years of PSM at DuPont, Risk management: The path forward, AIChE, New York, 2005.