Manurung, N., M. A. Pulungan, B. C. Manurung, E. W. B. Siahaan, and S. Siahaan. “Performance Test of 1500 Cc Fuel Motorcycle Using Pertalite – Bioethanol Mixture Fuel on Exhaust Gas”. International Journal of Research in Vocational Studies (IJRVOCAS), vol. 2, no. 4, Jan. 2023, pp. 25-31, doi:10.53893/ijrvocas.v2i4.159.