A. T. Rumiati, M. Rif’an, N. A. S. Harwanti, and H. A. Chusna, “Clustering of Primary and Secondary School in Indonesia Using The Fuzzy C-Means Method Based on School Self-Evaluation With Imputation Data”, journal-of-education, vol. 4, no. 8, pp. 20–31, Nov. 2021.