APA (7th ed.) Citation

Bell, L. (1972). The second World War: A guide to documents in the Public Record Office. HMSO.

Chicago Style (17th ed.) Citation

Bell, L. The Second World War: A Guide to Documents in the Public Record Office. London: HMSO, 1972.

MLA (8th ed.) Citation

Bell, L. The Second World War: A Guide to Documents in the Public Record Office. HMSO, 1972.

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