WINARNO, H. PERAWATAN ALAT (HEAVY EQUIPMENT) DENGAN PENJADWALAN MENGGUNAKAN METODE PREVENTIVE MAINTENANCE DI PT PURNA BAJA HARSCO. ReTII, [S. l.], 2017. Disponível em: https://journal.itny.ac.id/index.php/ReTII/article/view/354. Acesso em: 12 may. 2025.