Abdullah, Mohd Fauzi, and Nur Fazilah Othman. “Physicochemical and Adsorption Properties of Guava Leaves-Activated Carbon by Hydrochloric Acid on Adsorption of Methylene Blue”. Scientific Research Journal 20, no. 1 (March 17, 2023): 33–49. Accessed October 5, 2024. https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/3136.