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, doi: 10.65358/manbispar.v1i1.12.