APA (7th ed.) Citation

O'Callaghan, J. F. (2003). Reconquest and crusade in medieval Spain. Univ. of Pennsylvania Press.

Chicago Style (17th ed.) Citation

O'Callaghan, Joseph F. Reconquest and Crusade in Medieval Spain. Philadelphia: Univ. of Pennsylvania Press, 2003.

MLA (9th ed.) Citation

O'Callaghan, Joseph F. Reconquest and Crusade in Medieval Spain. Univ. of Pennsylvania Press, 2003.

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