Rozikin, Nur Afif, and Rachmat Firdaus. “Effect Of Additional Variations Of Etanol Fuel On Exhaust Gas Emissions On Yamaha 125cc Motorcycles”. Academia Open 40 (August 14, 2021): 10.21070/acopen.4.2021.1969. Accessed November 21, 2024. https://acopen.umsida.ac.id/index.php/acopen/article/view/1969.