N. Sumarni, E. Suherman, Suroso, and A. Mubarok, “STRATEGI PENGUATAN PEMASARAN BERBASIS DELTA MODEL PADA SMP ISLAM KARAWANG”, jsj, vol. 4, no. 1, pp. 1–8, May 2022, Accessed: Oct. 22, 2026. Available: https://ejurnal.ars.ac.id/index.php/jsj/article/view/727