lubis , L. A., suryani, W. and Rafiki , A. (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), pp. 1429–1441. doi: 10.37531/amar.v5i2.3367.