Putra, Yogi, harfardi harfardi, and M Hadi. “Perencanaan Perawatan Mesin Pengupas Sabut Kelapa”. Jurnal Teknik Mesin 10, no. 2 (July 11, 2019): `19-24. Accessed May 3, 2024. http://ejournal2.pnp.ac.id/index.php/jtm/article/view/182.