Praweenwongwuthi, Sorat, Suwit laohasiriwong, และ A. Terry Rambo A. Terry Rambo. 2009. “Impacts of Adoption of Rice Combine Harvesters on the Economic and Social Conditions of Farmers in Tung Kula Ronghai”. วารสารแก่นเกษตร 37 (4):349-56. https://li01.tci-thaijo.org/index.php/agkasetkaj/article/view/250444.