Muslim, Kori Lilie, and Melia Afdayeni. “UMAR BIN ABDUL AZIS: ZAMAN KEEMASAN ISLAM MASA DINASTI UMAYYAH”. Islam Transformatif : Journal of Islamic Studies, vol. 3, no. 1, Nov. 2019, pp. 30-37, doi:10.30983/it.v3i1.797.