USMAN, R. Analisis Kerusakan Katup pada Mesin Diesel 9 L21/31 Internal Combustion Engine. Prosiding Seminar Nasional Teknoka, [S. l.], v. 1, n. 1, p. M203 - M212, 2017. Disponível em: https://journal.uhamka.ac.id/index.php/teknoka/article/view/894. Acesso em: 16 jul. 2024.