APA (7th ed.) Citation

Somerville, R. (2011). Pope Urban II's Council of Piacenza: March 1 - 7, 1095. Oxford University Press.

Chicago Style (17th ed.) Citation

Somerville, Robert. Pope Urban II's Council of Piacenza: March 1 - 7, 1095. Oxford [u.a.]: Oxford University Press, 2011.

MLA (9th ed.) Citation

Somerville, Robert. Pope Urban II's Council of Piacenza: March 1 - 7, 1095. Oxford University Press, 2011.

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