Aulia, Clarissa, and Vina Gabriella Saragih. “Comparison of Ruangguru and Primagama Promotion Strategies in Attracting Consumers”. Jurnal Manajemen Bisnis Dan Pariwisata, vol. 1, no. 1, June 2025, pp. 30-38, https://journal.arfadigitech.com/index.php/manbispar/article/view/12.