Борба за инвеституру — разлика између измена

|editor-first=Kenneth

|title=Sources in Medieval Culture and History

* {{Cite book|ref=harv|last=Blumenthal|first=Uta-Renate|year=1988|title=The Investiture Controversy: Church and Monarchy from the Ninth to the Twelfth Century|publisher=University of Pennsylvania Press}}

* {{Cite book|ref=harv|last=Cantor|first=Norman F.|author-link=Norman Cantor|year=1958|title=Church, Kingship, and Lay Investiture in England, 1089–1135|publisher=Princeton University Press}}