Md Huzir, N., Amin, A. N. R. ., Tamunaidu, P., & Vadivelu, Y. . (2025). Sustainable Biodiesel Production from Waste Cooking Oil Using Diatomite as a Catalyst. International Journal of Integrated Engineering, 17(4), 229-242. https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/20377