Musonnif, Ahmad. 2015. “KALENDER UMM AL-QURA (Studi Pergeseran Paradigma Sistem Kalender Di Kerajaan Arab Saudi)”. Ahkam: Jurnal Hukum Islam 3 (2), 165-86. https://doi.org/10.21274/ahkam.2015.3.2.165-186.