Sihombing, S., Rahmat W. Sembiring and Eka Irawan 2022. Application of the K-Means Clustering Algorithm in Grouping Regencies/Cities in North Sumatra Province Based on Human Development Index Indicators. Jurnal Mandiri IT. 11, 1 (Jul. 2022), 20–25. DOI:https://doi.org/10.35335/mandiri.v11i1.124.