SORANI, SITI IZZATUL AISYAH BT MOHD SORANI, et al. “Study on Mechanical Properties of Concrete Contain Untreated and Treated Pineapple Leaf Fiber”. Progress in Engineering Application and Technology, vol. 3, no. 1, June 2022, pp. 306-1, https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6413.