M. Nafiudin and I. Rindaningsih, “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”, ijins, vol. 27, no. 2, p. 10.21070/ijins.v27i2.1938, Sep. 2026.