Sitompul, M. P. U. ., Sitompul, O. S. . and Situmorang, Z. . (2022) “Optimization of Determination Against K-Means Cluster Algorithm using Elbow Creation”, Jurnal Teknik Informatika C.I.T Medicom, 14(1), pp. 1–9. doi: 10.35335/cit.Vol14.2022.176.pp1-9.