Siregar, Zufri Hasrudy. “Analysis of Yamaha Scorpio Engine Performance With Variation of Ethanol Fuel and Shell V Power”. International Journal of Research in Vocational Studies (IJRVOCAS) 2, no. 4 (January 30, 2023): 135–144. Accessed October 5, 2024. https://journal.gpp.or.id/index.php/ijrvocas/article/view/179.