APA (7th ed.) Citation

Cantwell, J. D. (1993). The Second World War: A guide to documents in the Public Record Office (2nd ed.). HMSO.

Chicago Style (17th ed.) Citation

Cantwell, John D. The Second World War: A Guide to Documents in the Public Record Office. 2nd ed. London: HMSO, 1993.

MLA (9th ed.) Citation

Cantwell, John D. The Second World War: A Guide to Documents in the Public Record Office. 2nd ed. HMSO, 1993.