Rahmadi, Muhamad, and Sri Zetli. 2022. “ANALISIS TOTAL PREVENTIVE MAINTANANCE PADA MESIN DRILLING KOCH DI PT. XYZ”. Computer and Science Industrial Engineering (COMASIE) 6 (4):69-78. https://forum.upbatam.ac.id/index.php/comasiejournal/article/view/5307.