Ramadhan, Muhammad Fajar, et al. “Sentiment Analysis and Topic Modeling of Ruangguru Application User Reviews Using IndoBERT and BERTopic on a Kaggle Dataset”. Journal of Informatics and Vocational Education, vol. 9, no. 3, July 2026, pp. 67-77, https://doi.org/10.20961/joive.v9i3.3820.