Batubara, H. S., Ambiyar, A., Syahril, S., Fadhilah, F., & Watrianthos, R. (2021). Sentiment analysis of face-to-face learning based on social media. Jurnal Pendidikan Teknologi Kejuruan, 4(3), 102-106. https://doi.org/10.24036/jptk.v4i3.22623