An Implementation of Loyalty Program Theory Based on Recency Frequency Monetary Score in Information Systems to Increase Customer Loyalty. J. Inf. Syst. Explor. Res. [Internet]. 31. januar 2025 [henvist 25. august 2026];3(1):45-52. Tilgængelig hos: https://shmpublisher.com/index.php/joiser/article/view/538