Pradana, A. W., and M. Hayaty. “The Effect of Stemming and Removal of Stopwords on the Accuracy of Sentiment Analysis on Indonesian-Language Texts”. Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control, vol. 4, no. 4, Oct. 2019, pp. 375-80, doi:10.22219/kinetik.v4i4.912.