Noorul Hudai Abdullah, Norhayati Ngadiman, Nor Baizura Hamid, Hazirah Bujang, Suhaila Sahat, and Muhammad Azraie Abdul Kadir, Environmental Engineering (Laboratory). Penerbit UTHM, 2023. Accessed: Aug. 17, 2024. [Online]. Available: https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/384