Primandari, Sri Rizki Putri, Andril Arafat, and Harumi Veny. “Optimization of Waste Cooking Oil’s FFA As Biodiesel Feedstock”. Teknomekanik 4, no. 1 (May 24, 2021): 14-21. Accessed March 28, 2024. http://teknomekanik.ppj.unp.ac.id/index.php/teknomekanik/article/view/90.