A History of the peninsular war,
by Charles Oman ...

APA Citation

Oman, C., Hall, J. A. (19021998). A History of the peninsular war. Oxford: Clarendon Press.

MLA Citation

Oman, Charles, 1860-1946, and John A Hall. A History of the Peninsular War. Oxford: Clarendon Press, 19021998.

Warning: These citations may not always be complete (especially for serials).