Sumarni N, Suherman E, Suroso, Mubarok A. STRATEGI PENGUATAN PEMASARAN BERBASIS DELTA MODEL PADA SMP ISLAM KARAWANG. jsj [Internet]. 2022May25 [cited 2024Nov.21];4(1):1-. Available from: https://ejurnal.ars.ac.id/index.php/jsj/article/view/727