lubis , L.A. et al. 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 (Dec. 2025), 1429–1441. DOI:https://doi.org/10.37531/amar.v5i2.3367.