APA (7th ed.) Citation

Hay, I. (1941). The battle of Flanders 1940. HMSO.

Chicago Style (17th ed.) Citation

Hay, Ian. The Battle of Flanders 1940. London: HMSO, 1941.

MLA (8th ed.) Citation

Hay, Ian. The Battle of Flanders 1940. HMSO, 1941.

Warning: These citations may not always be 100% accurate.