Kariyam, K., A. Abdurakhman, and A. . Ronnie Effendie. “Application of Block-Based K-Medoids and Ward’s Method to Classify Provinces in Indonesia Based on Environmental Quality Index”. Eduvest - Journal of Universal Studies, vol. 3, no. 2, Feb. 2023, pp. 374-8, doi:10.59188/eduvest.v3i2.738.