“Pengelompokkan Pendonor Darah Berdasarkan Golongan Darah Di PMI Kabupaten Langkat Menggunakan Metode Clustering K-Means” (2025) Fusion : Journal of Research in Engineering, Technology and Applied Sciences, 2(1), pp. 40–48. Available at: https://ejurnal.faaslibsmedia.com/index.php/fusion/article/view/261 (Accessed: 13 October 2025).