Padillah, Ridwan, and Hestya Patrie. 2018. “UPAYA PENINGKATAN PELAYANAN DAN LOYALITAS CUSTOMER DI PT. AL AMIN MULIA LESTARI”. IDEALIS : InDonEsiA JournaL Information System 1 (5), 226-32. https://jom.fti.budiluhur.ac.id/index.php/IDEALIS/article/view/1009.