“ANALISIS TARIF, KEAHLIAN KHUSUS, KERAMAHAN PELAYAN TERHADAP KEPUASAN COSTUMER BENGKEL ESTU LANGGENG MOTOR DAN BENGKEL ABADI MOTOR”. 2021. MANAGEMENT SCIENCE 2 (1): 10-17. https://jurnal.uniwa.ac.id/index.php/managementscience/article/view/70.