Hasan Maksum, Wawan Purwanto, and Ali Basrah Pulungan. “THE EFFECT OF WASTE COOKING OIL BIODIESEL TO THE DIESEL ENGINE PERFORMANCE”. GEOMATE Journal 17, no. 64 (December 28, 2019): 245–251. Accessed May 8, 2024. https://geomatejournal.com/geomate/article/view/575.