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 (Sep. 2024), 80–87. DOI:https://doi.org/10.15294/fqc79v89.