Palomargareta, Gebriela, and Muhlasin Amrullah. “Da’wah of the Muhammadiyah Student Association in Tanggulangin District During the Covid 19 Pandemic”. Proceedings of The ICECRS 100 (October 10, 2021). Accessed May 21, 2024. https://icecrs.umsida.ac.id/index.php/icecrs/article/view/1177.