Manurung, V. A. T., and E. Setiawan. “MENINGKATKAN EFISIENSI ANGGARAN MAINTENANCE DI PT UNITED TRACTORS AREA FMC SIMS SITE BATUKAJANG–KALTIM STUDI KASUS SARINGAN UDARA (AIR FILTER)”. Technologic, vol. 8, no. 2, Mar. 2018, https://technologic.polytechnic.astra.ac.id/index.php/firstjournal/article/view/213.