Ananda, R., and Achmad Zaki Yamani. “Determination of Initial K-Means Centroid in the Process of Clustering Data Evaluation of Teaching Lecturers”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi), Vol. 4, no. 3, June 2020, pp. 544 -50, doi:10.29207/resti.v4i3.1896.