Bastian, Ade, Ardi Mardiana, and Dinda Sri Wulansari. 2023. “Sentiment Analysis Against Political Figure’s Billboard During Pandemic Using Naïve Bayes Algorithm ”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi) 7 (1), 138 -45. https://doi.org/10.29207/resti.v7i1.4643.