APA (7th ed.) Citation

Oman, C., & Griffith, P. (1999). A history of the Peninsular War. Greenhill.

Chicago Style (17th ed.) Citation

Oman, Charles, and Paddy Griffith. A History of the Peninsular War. London: Greenhill, 1999.

MLA (9th ed.) Citation

Oman, Charles, and Paddy Griffith. A History of the Peninsular War. Greenhill, 1999.