- Carroll, Bill. Chairman of the board at the American Chemistry Council. Personal interview. April 11, 2012.
- Environmental Protection Agency official web site. "Plastics." (April 10, 2012) http://www.epa.gov/epawaste/conserve/materials/plastics.htm
- Kingsbury, Tony. Professor at University of California, Berkeley's Haas School of Business. Personal interview. April 10, 2012.
- Mieszkowski, Katharine. "Plastic bags are killing us." Salon.com. Aug. 10, 2007. (April 6, 2012) http://www.salon.com/2007/08/10/plastic_bags/
- O'Lochlainn, Ross. Consultant at ERA Environmental Management Solutions. Personal correspondence. April 5, 2012.
- Schrage, Andrew. Co-owner of Money Crashers Personal Finance. Personal correspondence. April 5, 2012.