Ruzi, I. I. ., Ishak, A. R. ., Abdullah, M. A. ., Zain, N. N. M. ., Tualeka, A. R. ., & Aziz, M. Y. (2023). Assessment of Heavy Metal Concentrations in Penang, Malaysia’s Wastewater Treatment Plants: A Wastewater-Based Epidemiology Approach. Trends in Sciences, 20(5), 6523. https://doi.org/10.48048/tis.2023.6523