APA (7th ed.) Citation

Duruy, V. (1891). The history of the middle ages. Henry Holt and Company.

Chicago Style (17th ed.) Citation

Duruy, Victor. The History of the Middle Ages. New York: Henry Holt and Company, 1891.

MLA (8th ed.) Citation

Duruy, Victor. The History of the Middle Ages. Henry Holt and Company, 1891.