APA (7th ed.) Citation

Barker, E. (1939). The Crusades (Repr.). Oxford Univ. Pr.

Chicago Style (17th ed.) Citation

Barker, Ernest. The Crusades. Repr. London: Oxford Univ. Pr, 1939.

MLA (9th ed.) Citation

Barker, Ernest. The Crusades. Repr. Oxford Univ. Pr, 1939.

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