สุดบรรฑิตย์ อนุภัทร, and ชั่งชัย ณัฏฐวี. “The Paint factory’s Wastewater: COD Removal by Chemical Precipitation Method”. RMUTSB ACADEMIC JOURNAL 6, no. 2 (December 21, 2018): 171–181. Accessed May 2, 2024. https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/149278.