Clustering Analysis in Sales Grouping Using The K-Means Algorithm at Cafe 47°Coffee. CESS (Journal of Computer Engineering, System and Science) [Internet]. 19 Juli 2022 [dikutip 1 Mei 2026];7(2):420-34. Tersedia pada: https://jurnal.unimed.ac.id/2012/index.php/cess/article/view/35569