lubis , Laila Annisyah, Wan suryani, and Ahmad Rafiki. 2025. “The Influence of Maintenance Reminder Appointment and Customer Satisfaction on Customer Retention With After-Sales Service Productivity As an Intervening Variable at Auto2000 SM Raja Medan”. Amkop Management Accounting Review (AMAR) 5 (2):1429-41. https://doi.org/10.37531/amar.v5i2.3367.