Rabbani, M. Azzam. “The Effect of Customer Relationship Management on Customer Retention at KMU Gresik Eye Clinic”. International Journal of Review Management Business and Entrepreneurship (RMBE) 2, no. 2 (December 17, 2022): 152–159. Accessed February 19, 2026. https://ojs.somebut.my.id/index.php/RMBE/article/view/3409.