Christian L. Balatbat, Emerly I. Balagosa, Earl John M. Dagdag, Leoj Y. Manliclic, Erwin Ronald D. Calma, and Rico Jay S. Laxa. “A Cost-Benefit Analysis of Roof Tiles With Polyethylene Terephthalate and Concrete Waste in Construction Industry”. International Journal of Progressive Research in Science and Engineering 5, no. 04 (May 2, 2024): 29–36. Accessed July 3, 2024. https://journal.ijprse.com/index.php/ijprse/article/view/1036.