Shukor, M.Y., S.A. Raslan, K. Ithnin, N.A. Shamaan, and M.A. Syed. “An Iron Determination Method for Azo Dyes-Contaminated Wastewater”. Bulletin of Environmental Science and Sustainable Management (e-ISSN 2716-5353) 1, no. 1 (December 31, 2013): 5–10. Accessed June 28, 2025. https://journal.hibiscuspublisher.com/index.php/BESSM/article/view/991.