Rozikin, Nur Afif, and Rachmat Firdaus. “Effect Of Additional Variations Of Etanol Fuel On Exhaust Gas Emissions On Yamaha 125cc Motorcycles: Pengaruh Variasi Penambahan Bahan Bakar Etanol Terhadap Emisi Gas Buang Pada Sepeda Motor Yamaha 125cc”. Academia Open 4 (August 14, 2021): 10.21070/acopen.4.2021.1969. Accessed December 8, 2025. https://acopen.umsida.ac.id/index.php/acopen/article/view/1969.