APA (7th ed.) Citation

Spaight, J. M. (1941). The battle of Britain, 1940. G. Bles.

Chicago Style (17th ed.) Citation

Spaight, J. M. The Battle of Britain, 1940. London: G. Bles, 1941.

MLA (9th ed.) Citation

Spaight, J. M. The Battle of Britain, 1940. G. Bles, 1941.