Jaya, Danang, Tunjung Wahyu Widayati, Hanum Salsabiela, and Muhammad Fathan Abdul Majid. “Production of Biodiesel from Waste Cooking Oil Using Heterogeneous Catalyst”. Eksergi 19, no. 1 (April 5, 2022): 29–34. Accessed July 16, 2025. https://jurnal.upnyk.ac.id/index.php/eksergi/article/view/6132.