“ANALISIS TOTAL PREVENTIVE MAINTANANCE PADA MESIN DRILLING KOCH DI PT. XYZ”, comasiejournal, vol. 6, no. 4, hlm. 69–78, Jul 2022, Diakses: Okt 06, 2026. Tersedia pada: https://ejournal.upbatam.ac.id/index.php/comasiejournal/article/view/5307