Mahmuda, Fauziah, Maya Sitorus, Hilda Widyastuti, and Dwi Kurniawan. “Clustering Profil Pengunjung Perpustakaan Menggunakan Algoritma K-Means”. Journal of Applied Informatics and Computing 1, no. 1 (October 25, 2018): 14-21. Accessed August 7, 2020. https://jurnal.polibatam.ac.id/index.php/JAIC/article/view/476.