Rumalutur, Sonny, Alimuddin Mappa, and Erwin Sianipar. “AUTOMATIC CONTROL SYSTEM CHARGING FUEL TANKS AND MONITORING TEMPERATURES USING PLC”. Electro Luceat 6, no. 1 (July 1, 2020): 5-19. Accessed March 3, 2021. http://jurnal.poltekstpaul.ac.id/index.php/jelekn/article/view/194.