APA (7th ed.) Citation

Somerville, R. (1996). Pope Urban II, the Collectio Britannica and the council of Melfi (1089). Clarendon Press.

Chicago Style (17th ed.) Citation

Somerville, Robert. Pope Urban II, the Collectio Britannica and the Council of Melfi (1089). Oxford [u.a.]: Clarendon Press, 1996.

MLA (9th ed.) Citation

Somerville, Robert. Pope Urban II, the Collectio Britannica and the Council of Melfi (1089). Clarendon Press, 1996.

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