APA (7th ed.) Citation

Bishop, J. C. (1981). Pope Nicholas I. and the first age of Papal independence.

Chicago Style (17th ed.) Citation

Bishop, Jane Carol. Pope Nicholas I. and the First Age of Papal Independence. 1981.

MLA (9th ed.) Citation

Bishop, Jane Carol. Pope Nicholas I. and the First Age of Papal Independence. 1981.

Warning: These citations may not always be 100% accurate.