APA (7th ed.) Citation

Childs, J. (2003). Warfare in the seventeenth century. Cassell.

Chicago Style (17th ed.) Citation

Childs, John. Warfare in the Seventeenth Century. London: Cassell, 2003.

MLA (9th ed.) Citation

Childs, John. Warfare in the Seventeenth Century. Cassell, 2003.