Rizal, Muhammad, Shofia Nur Fadhila, and Prihantini. 2021. “Cluster Analysis Using Hierarchic Method for Classification of District / City of North Kalimantan Province Based on Human Development Indicators (HDI)”. Proceeding International Conference on Science and Engineering 4 (February):235-39. http://sunankalijaga.org/prosiding/index.php/icse/article/view/665.