Investiturni boj: razlika med redakcijama

({{normativna kontrola}})
* Cowdrey, H.E.J. (1998). ''Pope Gregory VII, 1073–1085''. Oxford University Press.
* Jolly, Karen Louise. (1997). ''Tradition & Diversity: Christianity in a World Context to 1500''. ME Sharpe.
* {{navedi knjigo |author=McCarthy, T. J. H. (|year=2014). ''|title=Chronicles of the Investitureinvestiture contest Contest: Frutolf of Michelsberg and his continuators''. |publisher=Manchester: [[Manchester MedievalUniversity Sources]].Press ISBN|isbn=9780719084706 9780719084706.|cobiss= |pages=}}
* Metz, René. (1960). ''What Is Canon Law?'' Hawthorn Books. New York.
* Morrison, Karl F., ed. ''The investiture controversy: issues, ideas, and results'' (Holt McDougal, 1971) excerpts from primary and secondary sources