Clustering Regions in West Sumatera Based on the Special Protection Index for Children Using K-Means Clustering with Silhouette Coefficient . ujsds [Internet]. 28 Februari 2025 [dikutip 4 Oktober 2026];3(1):123-9. Tersedia pada: https://ujsds.ppj.unp.ac.id/index.php/ujsds/article/view/356