Chatpanyacharoen, W., N. Hungspreug, B. Anurugsa, and S. Taweesuk. “Water Footprint Evaluation of Oryza Sativa L.Tha Wang Pha District, Nan Province”. Science & Technology Asia, Vol. 20, no. 4, 1, pp. 21-28, https://www.tci-thaijo.org/index.php/SciTechAsia/article/view/44167.