Rubiantari, Mulyani, and Hazim Hazim. “The Relationship Between Religiosity and Altruistic Behavior on Covid-19 Volunteers of Muhammadiyah Sidoarjo: Hubungan Antara Religiusitas Dengan Perilaku Altruistik Pada Relawan Covid-19 Muhammadiyah Sidoarjo”. Journal of Islamic and Muhammadiyah Studies 5 (August 30, 2023): 10.21070/jims.v5i0.1572. Accessed September 7, 2025. https://jims.umsida.ac.id/index.php/jims/article/view/1572.