1. An Evaluation of California's Mandated Commodity Promotion Programs
2. Beach, R. H., Zhen, C., Piggott, N. E., Wohlgenant, M. K., Viator, C. L. & Cates, S. C. (2007). An economic analysis of the effectiveness of the pork checkoff program (RTI Project Number 0210314.000), Research Triangle, Inc. Research Triangle Park, NC, USA. Retrieved from http://www.rti.org/sites/default/files/resources/beach_pork-checkoff_final.pdf
3. Generic Advertising of U.S. Lamb
4. ICF International. (2007). Propane market trends: Evaluating PERC investment in the residential propane market.” Presentation prepared for the Propane Education and Research Council, April 13.