Ernawati, S. and Wati, R. 2022. SENTIMENT ANALYSIS OF THREE-PERIOD POLEMICS USING K-NEAREST NEIGHBOR WITH TF-IDF WEIGHTING. Jurnal Riset Informatika. 4, 3 (Jun. 2022), 215–220. DOI:https://doi.org/10.34288/jri.v4i3.160.