Nafiudin, M. and Rindaningsih, I. 2026. Marketing Management Development Strategy of SMP Muhammadiayah 3 Kutorejo Based on The Delta Model: Strategi Pengembangan Manajemen Pemasaran SMP Muhammadiayah 3 Kutorejo Berbasis The Delta Model. Indonesian Journal of Innovation Studies. 27, 2 (Sep. 2026), 10.21070/ijins.v27i2.1938. DOI:https://doi.org/10.21070/ijins.v27i2.1938.