Anam, Khoirul. “Pengaruh Putaran, Celah Busi, Celah Katub, Minyak Atsiri Terhadap Emisi Gas Buang”. Surya Teknika : Jurnal Ilmiah Teknik Mesin 8, no. 1 (April 25, 2024): 26–34. Accessed July 8, 2025. https://jurnal.umpp.ac.id/index.php/surya_teknika/article/view/1796.