Syah, Irfan Ardian. “Pergeseran Dari Sistem Khilafah Ke Nation State Dunia Islam”. UIR Law Review 1, no. 2 (October 25, 2017): 201–212. Accessed August 7, 2026. https://journal.uir.ac.id/index.php/uirlawreview/article/view/752.