Santiphontam , R. ., and S. . Namsena. “Right Livelihood of Farmers in Mueang Nakhonsawan District”. Dhammathas Academic Journal, vol. 20, no. 3, Sept. 2020, pp. 247-58, https://so06.tci-thaijo.org/index.php/dhammathas/article/view/163671.