Terry, B. D., R. Godke, B. Heltemes, and L. Wiggins. “Engaging Volunteers through ISOTURES: Evaluating Volunteer Programs: 4-H 6.10/4H308, 10/2010”. EDIS, vol. 2011, no. 1, Jan. 2011, doi:10.32473/edis-4h308-2010.