Lubis, Siti Sahara. “Customer Relationship Management in Increasing Customer Loyalty Using the K-Means Algorithm”. Journal of Computer Scine and Information Technology 9, no. 1 (January 31, 2023): 36–41. Accessed June 18, 2026. https://jcsitech-upiyptk.org/ojs/index.php/jcsitech/article/view/60.