Noorul Hudai Binti Abdullah, Norhayati Ngadiman, Mohd Erwan Sanik, and Hazri Mokhtar, Civil Engineering Materials (Laboratory) Version 2022. Penerbit UTHM, 2022. Accessed: Aug. 26, 2026. [Online]. Available: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/295