NOORUL HUDAI ABDULLAH, NORHAYATI NGADIMAN, and NOR BAIZURA HAMID, ENVIRONMENTAL ENGINEERING (LABORATORY) VERSION 2023. Penerbit UTHM, 2025. Accessed: Mar. 12, 2026. [Online]. Available: https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/490