Vilhelm Jernarm: Forskelle mellem versioner

* Brown, Gordon S. ''The Norman Conquest of Southern Italy and Sicily''. McFarland, 2003, ISBN 978-0-7864-1472-7

* Ghisalberti, Albert (ed). ''Dizionario Biografico degli Italiani: II Albicante – Ammannati''. [[Rome]], 1960.

* [[H. M. Gwatkin|Gwatkin, H.M.]], [[J. P. Whitney|Whitney, J.P.]] (ed) et al. ''The Cambridge Medieval History: Volume III''. [[Cambridge University Press]], 1926.

* [[John Julius Norwich|Norwich, John Julius]]. ''The Normans in the South 1016-1130''. [[Longmans]]: [[London]], 1967.

* [[Ferdinand Chalandon|Chalandon, Ferdinand]]. ''Histoire de la domination normande en Italie et en Sicilie''. [[Paris]], 1907.

* Gravett, Christopher, and Nicolle, David. ''The Normans: Warrior Knights and their Castles''. [[Osprey Publishing]]: [[Oxford]], 2006.

* Beech, George. ''A Norman-Italian Adventurer in the East: Richard of Salerno''. 1993.

* [http://www.norman-world.com/angleterre/histoires/index_histoires.htm History of the Norman World].

* [http://www.leeds.ac.uk/history/weblearning/MedievalHistoryTextCentre/medievalTexts.htm Leeds Medieval History Texts in Translation.]

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