HARTANTO, S; ., Handoko; ARIFIN, Z. Analysis of Learning Material on 4-Stroke Engine Tune-Up Practice of Motorcycle Engineering. KnE Social Sciences, [S. l.], v. 3, n. 15, p. 25–35, 2019. DOI: 10.18502/kss.v3i15.4351. Disponível em: https://knepublishing.com/index.php/KnE-Social/article/view/4351. Acesso em: 15 jul. 2025.