Maṣādir tārīkh al-Jazīrah al-ʿArabīyah - Anṣārī, ʿAbd al-Raḥmān al-Ṭayyib; ʿAbd Allāh, ʿAbd al-Qādir Maḥmūd, 1937-; Ṣaqqār, Sāmī; Mortel, Richard, 1952- (1979)