Cita APA

Somerville, R. 1. (1972). The councils of Urban II. Amsterdam: Adolf M. Hakkert, Publisher.

Citación estilo Chicago

Somerville, Robert 1940-. The Councils of Urban II. Amsterdam: Adolf M. Hakkert, Publisher, 1972.

Cita MLA

Somerville, Robert 1940-. The Councils of Urban II. Amsterdam: Adolf M. Hakkert, Publisher, 1972.