Gunawan, Yuspian, La Hasanuddin, Raden Rinova Sisworo, Agustinus Lolok, Bunyamin, Nanang Endriatno, and Muhlas Adi Putra. “Percentage Analysis Mixed of CPO, Phosphic Acid and Sodium Hydroxide As a Replacement for Diesel Engine Oil Fuel Using a Calorize Test”. International Journal of Engineering and Computer Science 9, no. 09 (September 21, 2020): 25189–25198. Accessed July 3, 2024. https://ijecs.in/index.php/ijecs/article/view/4529.