Masood Ahmed Riaz ,Shakir Adam ,Khalid Mehmood. PIOUS CALIPHATE VS UMAYYAD KINGSHIP: A COMPARATIVE STUDY OF BASIC RELIGIOUS STRUCTURE . pjia [Internet]. 2021 Dec. 31 [cited 2026 May 9];4(4). Available from: http://pjia.com.pk/index.php/pjia/article/view/256