“Grouping The Districts in Sumatera Region Based on Economic Development Indicators Using K-Medoids and CLARA Methods”, ujsds, vol. 1, no. 1, hlm. 16–22, Feb 2023, Diakses: Okt 03, 2026. Tersedia pada: https://ujsds.ppj.unp.ac.id/index.php/ujsds/article/view/13