Rohmantoro, Didik, 		Purnomo, Bayu, AND 		Amiruddin, Muhamad.
" KONTRIBUSI TEKNOLOGI HYDROCARBON CRACK SYSTEM TERHADAP NOISE  MESIN KENDARAAN SEPEDA MOTOR 4-TAK" <em>Journal of Vocational Education and Automotive Technology</em> [Online], Volume 2 Number 2 (8 November 2020)