The Ministry of Information. (1943). Roof over Britain: The official story of Britain's anti-aircraft defenses 1939-1942. His Majesty's Stationery Office.
Cita Chicago (17th ed.)The Ministry of Information. Roof over Britain: The Official Story of Britain's Anti-aircraft Defenses 1939-1942. Londres: His Majesty's Stationery Office, 1943.
Cita MLA (9th ed.)The Ministry of Information. Roof over Britain: The Official Story of Britain's Anti-aircraft Defenses 1939-1942. His Majesty's Stationery Office, 1943.
Atenció: Aquestes cites poden no estar 100% correctes.