Alex Kaufman และ Suriyapong Watanasak. (2011) Farmers and Fertilizers A Socio-ecological Exploration of the Alternative Agriculture Movement in Northeastern Thailand. <i>Environment and Natural Resources Journal</i>, <i>9</i>(3), 1.Alex Kaufman และ Suriyapong Watanasak. "Farmers and Fertilizers A Socio-ecological Exploration of the Alternative Agriculture Movement in Northeastern Thailand". Environment and Natural Resources Journal 9 (2011):1.Alex Kaufman และ Suriyapong Watanasak. Farmers and Fertilizers A Socio-ecological Exploration of the Alternative Agriculture Movement in Northeastern Thailand. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์:ม.ป.ท. 2011.