Fikri, M. and Abidin, Z. (2024) “Analysis Of The Use Of Nazief-Adriani Stemming And Porter Stemming In Covid-19 Twitter Sentiment Analysis With Term Frequency-Inverse Document Frequency Weighting Based On K-Nearest Neighbor Algorithm”, Recursive Journal of Informatics, 2(2), pp. 80 - 87. doi: 10.15294/rji.v2i2.74267.