APA (7th ed.) Citation

Robinson, I. S. 1. F. 1. (1990). The papacy, 1073-1198: Continuity and innovation. Cambridge University Press. https://doi.org/10.1017/CBO9781139167772

Chicago Style (17th ed.) Citation

Robinson, I. S. 1947 February 11-. The Papacy, 1073-1198: Continuity and Innovation. Cambridge: Cambridge University Press, 1990. https://doi.org/10.1017/CBO9781139167772.

MLA (9th ed.) Citation

Robinson, I. S. 1947 February 11-. The Papacy, 1073-1198: Continuity and Innovation. Cambridge University Press, 1990. https://doi.org/10.1017/CBO9781139167772.