SUJARWO, S. K-Means Clustering Gross Participation Rate Regency/City Area In North Sumatra. Jurnal Mantik, [S. l.], v. 5, n. 4, p. 2392-2399, 2022. Disponível em: https://www.iocscience.org/ejournal/index.php/mantik/article/view/1844. Acesso em: 20 oct. 2026.