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