Blumenthal, U. (1988). The investiture controversy: Church and monarchy from the ninth to the twelfth century. University of Pennsylvania Press.
Citace podle Chicago (17th ed.)Blumenthal, Uta-Renate. The Investiture Controversy: Church and Monarchy from the Ninth to the Twelfth Century. Philadelphia [Pa.]: University of Pennsylvania Press, 1988.
Citace podle MLA (9th ed.)Blumenthal, Uta-Renate. The Investiture Controversy: Church and Monarchy from the Ninth to the Twelfth Century. University of Pennsylvania Press, 1988.
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