Chantrasupt, Nanmanat. “The Problems of Wastewater Management in the Sub-District Administrative Organization Area”. Journal of International Studies, Prince of Songkla University 12, no. 1 (June 23, 2022): 59–88. Accessed May 6, 2024. https://so03.tci-thaijo.org/index.php/jis/article/view/250417.