Icwanudin, Icwanudin, Joko Suwignyo, & Fahmy Fatra. " STUDI EKSPERIMEN PENGARUH CELAH BUSI DAN JENIS BUSI TERHADAP EMISI GAS BUANG PADA SEPEDA MOTOR 4 TAK 150 CC." Journal of Vocational Education and Automotive Technology [Online], 4.1 (2022): 107-114. Web. 5 Jul. 2025