*{{cite book |last=Hopkins |first=T.C.F. |date=2008 |title=Empires, Wars, and Battles: The Middle East from Antiquity to the Rise of the New World |publisher=Macmillan |isbn=1466841710 |pages=174 |ref=harv}}
*The Plantagenets, The Magnificent Century, Thomas B Costain 1951
*{{cite book |last=Runciman |first=Steven |authorlink=Steven Runciman |date=1958 |title=The Sicilian Vespers: A History of the Mediterranean World in the Later Thirteenth Century |location=London |publisher=Cambridge University Press |oclc=315065012 |ref=harv}}
*{{cite book |last=Abulafia |first=David |date=1995 |title=The New Cambridge Medieval History |volume=Volume 5, C.1198-c.1300 |location=Cambridge |publisher=Cambridge University Press |isbn=052136289X |ref=harv}}
