“PENGARUH PENAMBAHAN ZAT ADIKTIF PADA PREMIUM TERHADAP POLUSI UDARA KENDARAAN BERMOTOR”, MACHINE, vol. 2, no. 1, Sep. 2018, Accessed: Apr. 10, 2026. [Online]. Available: https://www.journal.ubb.ac.id/index.php/machine/article/view/439