J. Guenthner. "The Development of United Potato Growers Cooperatives" (PDF)
C. Gingrich and E. King. "Does Fair Trade Fulfill the Claims of its Proponents? Measuring the Global Impact of Fair Trade on Participating Coffee Farmers" (PDF)
R. Holcomb, P. Kenkel and L. Brown. "Factors Impacting Participation In and Purchases Made by Members of the Oklahoma Food Cooperative" (PDF)