Abdul Wahid Nuruddin, et al. “STUDI LITERATUR: PENGOLAHAN DAN PEMANFAATAN LIMBAH B3 (OLI BEKAS)”. Prosiding SNasPPM, vol. 5, no. 1, Aug. 2020, pp. 108-12, http://prosiding.unirow.ac.id/index.php/SNasPPM/article/view/320.