* {{citeবই bookউদ্ধৃতি | title=The Prophet and the Age of the Caliphates: The Islamic Near East from the 6th to the 11th Century | edition = Second | last=Kennedy| first=Hugh N. | authorlink=Hugh N. Kennedy | year=2004 | publisher=Pearson Education Ltd. | location=Harlow, UK |isbn=0-582-40525-4 | url = http://books.google.com/books?id=Wux0lWbxs1kC | ref=harv}}
* {{citeবই bookউদ্ধৃতি | editor-last=Kramer | editor-first=Joel L. | editor-link= | title=The History of al-Ṭabarī, Volume XXXIV: Incipient Decline. The Caliphates of al-Wathiq, al-Mutawakkil, and al-Muntasir A.D. 841-863/A.H. 227-248 | publisher=State University of New York Press | location=Albany, New York | year=1989 | isbn=0-88706-875-8 | url=http://books.google.com/books?id=nxyl-gp36y8C | ref=harv}}