Pattaratuma, S., and S. Yuktanun. “Training and Follow-up Study of Local Plant Utilization Development for Economic Development of Watershed Community”. Kasetsart Journal of Social Sciences, vol. 29, no. 3, Dec. 2008, pp. 257-65, https://so04.tci-thaijo.org/index.php/kjss/article/view/246473.