Febry Claudia Nabasa Siahaan, Nazaruddin, and Beby Karina Fawzeea. “SENTIMENT ANALYSIS ON PLN MOBILE APPLICATION USERS’ OPINIONS TO IMPROVE THE QUALITY OF PLN MOBILE SERVICES”. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) 3, no. 7 (June 26, 2024): 1191–1198. Accessed October 5, 2024. https://ijset.org/index.php/go/article/view/490.