APA (7th ed.) Citation

Whitehead, J. (2009). Cavalier and Roundhead spies: Intelligence in the Civil War and Commonwealth. Pen & Sword Military.

Chicago Style (17th ed.) Citation

Whitehead, Julian. Cavalier and Roundhead Spies: Intelligence in the Civil War and Commonwealth. Barnsley, S. Yorkshire: Pen & Sword Military, 2009.

MLA (9th ed.) Citation

Whitehead, Julian. Cavalier and Roundhead Spies: Intelligence in the Civil War and Commonwealth. Pen & Sword Military, 2009.