Zaidi, Nur Syamimi, Johan Sohaili, Zhang Zhan Loh, Azmi Arisa, and Norelyza Hussein. “Effect of Metal Content from Sewage Sludge on the Growth of Orthosiphon Stamineus”. Environmental and Toxicology Management 1, no. 3 (November 30, 2021). Accessed April 25, 2024. https://journal2.unusa.ac.id/index.php/ETM/article/view/2498.