Oktika M, Hidayat H, Tanjung S. Textbook Project on Social Problems Using Case Method. Rand. Inter. Edu. Ling. Sci. J. [Internet]. 2023Dec.31 [cited 2025Jan.25];4(4):1005-12. Available from: https://www.randwickresearch.com/index.php/rielsj/article/view/863