Sunsitthisawad, W., U. Inmuong, C. Yutthachaiyangkul, and T. Tulaphituk. “Effect of Alum Sludge on Aquatic Life(Thai)”. Asia-Pacific Journal of Science and Technology, vol. 11, no. 4, Apr. 2017, pp. 269-80, https://so01.tci-thaijo.org/index.php/APST/article/view/83978.