APA (7 वां संस्करण) प्रशस्ति पत्र

Blumenthal, U. (1988). The investiture controversy: Church and monarchy from the ninth to the twelfth century. University of Pennsylvania Press.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Blumenthal, Uta-Renate. The Investiture Controversy: Church and Monarchy from the Ninth to the Twelfth Century. Philadelphia: University of Pennsylvania Press, 1988.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Blumenthal, Uta-Renate. The Investiture Controversy: Church and Monarchy from the Ninth to the Twelfth Century. University of Pennsylvania Press, 1988.