Nizam, Nurul Athirah, and Nurasyikin Misdan. “Review of The Production of Biodiesel from Waste Cooking Oil Using Acid Alkaline Based Catalysts”. Progress in Engineering Application and Technology 3, no. 1 (June 19, 2022): 954–966. Accessed July 18, 2024. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6451.