Hasan Maksum, Wawan Purwanto, Wagino, Rahmat Desman Koto, Defelinu Harefa, Desman Telaumbanua, Sabar Jaya Zalukhu, and Exaudi Ziliwu. Analisis Motor Bakar. UNP PRESS, 2025. Accessed July 16, 2026. http://unppress.unp.ac.id/index.php/unp-press/catalog/book/188.