Lubis, R. M. F., J.-P. Huang, P.-C. Wang, K. Khoifin, Y. Elvina, and D. A. Kusumaningtyas. “Agglomerative Hierarchical Clustering (AHC) Method for Data Mining Sales Product Clustering”. Building of Informatics, Technology and Science (BITS), Vol. 5, no. 1, June 2023, p. 285−294, doi:10.47065/bits.v5i1.3569.