Nombuyiselo, M. ., A. O. Taiwo, A. . Abdultaofeek, and A. Ikudayisi. “Evaluation of Surface Water Quality Indices in Mthatha River Using Multivariate Statistical Techniques”. Indonesian Journal of Environmental Management and Sustainability, vol. 7, no. 1, Mar. 2023, pp. 1-12, doi:10.26554/ijems.2023.7.1.1-12.