Muriyatmoko, Dihin, et al. “Sentiment Analysis Covid-19 Vaccination on Twitter Social Media Using Naïve Bayes Method: Analisis Sentimen Masyarakat Terhadap Tindakan Vaksinasi Covid-19 Pada Media Sosial Twitter Menggunakan Metode Naïve Bayes”. Procedia of Engineering and Life Science, vol. 2, Nov. 2021, doi:10.21070/pels.v2i0.1144.