“Analyzing Customer Loyalty Levels through Segmentation in Aesthetic Clinics Using K-Means and RFAM”. IJID (International Journal on Informatics for Development) 13, no. 2 (December 29, 2024): 473–484. Accessed February 2, 2026. https://ejournal.uin-suka.ac.id/saintek/ijid/article/view/4841.