P. A. Simarmata, T. Widodo, and T. A. Karnawati, “The Influence of Digital Promotion, School Service Quality, And Brand Image on Parents’ Decisions In Choosing SMP Swasta Rk Bintang Timur Pematangsiantar”, Proc. Econ. Asia Int. Conf., vol. 2025, no. 1, pp. 1297–1308, Feb. 2026.