Putri, H. S., and E. B. Madya. “Ustadz Muhammad Eko Marpaung’s Social Media Strategy in Spreading Da’wah Content Through Saifullaah’s Instagram Social Media Account”. Edumaspul: Jurnal Pendidikan, Vol. 8, no. 2, Oct. 2024, pp. 3189-95, https://ummaspul.e-journal.id/maspuljr/article/view/8426.