กังวล สุรชัย. “CostsandReturnsof Organic Rice Production and Path Analysis of the Decisions Making on Organic Rice Production in Chiang MaiProvince”. Parichart Journal 30, no. 3 (October 9, 2017): 200–207. Accessed May 6, 2024. https://so05.tci-thaijo.org/index.php/parichartjournal/article/view/101087.