Noorul Hudai Abdullah, Norhayati Ngadiman, Nor Baizura Hamid, Hazirah Bujang, Suhaila Sahat, Muhammad Azraie Abdul Kadir. Environmental Engineering (Laboratory). Penerbit UTHM; 2023. Accessed August 27, 2026. https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/384