Howard‐Johnston, James. "Seventh‐Century Eastern Sources II: The History to the Year 682 and the Khuzistan Chronicle." Witnesses to a World Crisis: Historians and Histories of the Middle East in the Seventh Century. : Oxford University Press, 2010-06-10. Oxford Scholarship Online. 2010-09-01. Date Accessed 18 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208593.001.0001/acprof-9780199208593-chapter-5>.
Howard‐Johnston, J.(2010-06-10). Seventh‐Century Eastern Sources II: The History to the Year 682 and the Khuzistan Chronicle. In Witnesses to a World Crisis: Historians and Histories of the Middle East in the Seventh Century. : Oxford University Press. Retrieved 18 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208593.001.0001/acprof-9780199208593-chapter-5.
Howard‐Johnston, James. "Seventh‐Century Eastern Sources II: The History to the Year 682 and the Khuzistan Chronicle." In Witnesses to a World Crisis: Historians and Histories of the Middle East in the Seventh Century. : Oxford University Press, 2010-06-10. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208593.001.0001/acprof-9780199208593-chapter-5.
Howard‐Johnston J. Seventh‐Century Eastern Sources II: The History to the Year 682 and the Khuzistan Chronicle. In: Howard-Johnston J. Witnesses to a World Crisis: Historians and Histories of the Middle East in the Seventh Century. Oxford University Press; 2010. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208593.001.0001/acprof-9780199208593-chapter-5. Accessed June 18, 2013.