NINGSIH, Eva Lestari; MAHMUDA, Siti; HAYATI, Memi Nor. Clustering Regency in Kalimantan Island Based on People’s Welfare Indicators Using Ward’s Algorithm with Principal Component Analysis Optimization. International Journal of Engineering and Computer Science Applications (IJECSA), [S. l.], v. 4, n. 2, p. 121–134, 2025. DOI: 10.30812/ijecsa.v4i2.5363. Disponível em: https://journal.universitasbumigora.ac.id/IJECSA/article/view/5363. Acesso em: 27 sep. 2025.