Richardson, R. W. "Squash and Pumpkin"(PDF). United States Department of Agriculture, Agricultural Research Service, National Plant Germplasm System. Archived from the original(PDF) on September 24, 2015. Retrieved November 23, 2014.
Andrew F. Smith, "Pumpkins"Archived 2024-06-04 at the Wayback Machine, The Oxford Encyclopedia of Food and Drink in America. Ed. Gordon Campbell. Oxford University Press, 2003. Saint Mary's College of California. December 21, 2011.
Richardson, R. W. "Squash and Pumpkin"(PDF). United States Department of Agriculture, Agricultural Research Service, National Plant Germplasm System. Archived from the original(PDF) on September 24, 2015. Retrieved November 23, 2014.
Andrew F. Smith, "Pumpkins"Archived 2024-06-04 at the Wayback Machine, The Oxford Encyclopedia of Food and Drink in America. Ed. Gordon Campbell. Oxford University Press, 2003. Saint Mary's College of California. December 21, 2011.