APA (7th ed.) Citation

Curtis, E. (1912). Roger of Sicily and the Normans in Lower Italy, 1016-1154. G. P. Putnam's sons.

Chicago Style (17th ed.) Citation

Curtis, Edmund. Roger of Sicily and the Normans in Lower Italy, 1016-1154. New York London: G. P. Putnam's sons, 1912.

MLA (9th ed.) Citation

Curtis, Edmund. Roger of Sicily and the Normans in Lower Italy, 1016-1154. G. P. Putnam's sons, 1912.