Wan Daud, Syed Abdul Hafiz, Roslinda Ali, and Noraini Marsi. “A Study On Development Of A Concrete Brick Using Plastic PET Bottles As Fine Aggregates Using Solidworks Software”. Progress in Engineering Application and Technology 2, no. 2 (December 2, 2021): 097–105. Accessed July 18, 2024. https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/908.