Ire Puspa Wardhani, Yudi Irawan Chandra, and Ferri Yusra. 2023. “Application of the Naïve Bayes Classifier Algorithm to Analyze Sentiment for the Covid-19 Vaccine on Twitter in Jakarta”. International Journal of Innovation in Enterprise System 7 (1):1-18. https://doi.org/10.25124/ijies.v7i01.171.