Prabowo, Iwan Ady, et al. “Application of K-Means Clustering to Monitoring the Level of Fertilizer Usage in Rice Fields in Ngawi Regency”. Jurnal Teknologi Informasi Dan Komunikasi (TIKomSiN), vol. 10, no. 1, May 2022, pp. 44-49, doi:10.30646/tikomsin.v10i1.600.