อำพันธ์ทอง พิมพ์พรรณ. “An analysis of water quality in Suphanburi river with extreme value theorem”. RMUTSB ACADEMIC JOURNAL 7, no. 1 (June 21, 2019): 1–19. accessed April 22, 2026. https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/110168.