Noorul Hudai Binti Abdullah, Norhayati Ngadiman, Mohd Erwan Sanik, and Hazri Mokhtar, Textbook: Civil Engineering Materials (Laboratory) Version 2022. Penerbit UTHM, 2022. Accessed: Jul. 18, 2024. [Online]. Available: https://penerbit.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/295