Shukor, M.Y., S.A. Raslan, K. Ithnin, N.A. Shamaan, and M.A. Syed. 2013. “An Iron Determination Method for Azo Dyes-Contaminated Wastewater”. Bulletin of Environmental Science and Sustainable Management (e-ISSN 2716-5353) 1 (1):5-10. https://doi.org/10.54987/bessm.v1i1.991.