Bangun, Cicilia, Abdul Jalil, Derajat Amperajaya, and Roesfiansjah Rasjidin. 2022. “Preventive Maintenance Scheduling With Age Replacement Method at CNG Station”. Aptisi Transactions on Technopreneurship (ATT) 4 (2):153-63. https://doi.org/10.34306/att.v4i2.260.