APA (7th ed.) Citation

Powicke, M. (1962). Military obligation in mediaeval England: A study in liberty and duty. Clarendon Press.

Chicago Style (17th ed.) Citation

Powicke, Michael. Military Obligation in Mediaeval England: A Study in Liberty and Duty. Oxford: Clarendon Press, 1962.

MLA (8th ed.) Citation

Powicke, Michael. Military Obligation in Mediaeval England: A Study in Liberty and Duty. Clarendon Press, 1962.