C. Aulia and V. G. Saragih, “Comparison of Ruangguru and Primagama Promotion Strategies in Attracting Consumers”, Jurnal Manajemen Bisnis dan Pariwisata, vol. 1, no. 1, pp. 30–38, Jun. 2025, Accessed: Nov. 08, 2025. [Online]. Available: https://journal.arfadigitech.com/index.php/manbispar/article/view/12