APA (7th ed.) Citation

Pernoud & Grant. (1963). The crusades. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Pernoud and Grant. The Crusades. London: Oliver and Boyd, 1963.

MLA (8th ed.) Citation

Pernoud and Grant. The Crusades. Oliver and Boyd, 1963.

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