Rochim, Achmad, 		Suwignyo, Joko, AND 		Fatra, Fahmy.
" PENGARUH PENGGUNAAN CAMSHAFT RACING  DAN KNALPOT RACING TERHADAP KONSUMSI BAHAN BAKAR SEPEDA MOTOR MATIC 125 CC TAHUN 2013" <em>Journal of Vocational Education and Automotive Technology</em> [Online], Volume 3 Number 1 (28 April 2021)