Rubiantari, M., and H. 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, vol. 5, Aug. 2023, p. 10.21070/jims.v5i0.1572, doi:10.21070/jims.v5i0.1572.