APA (7th ed.) Citation

O'Brien. (1955). Civil defence. Majesty's Stationary Office & Longman.

Chicago Style (17th ed.) Citation

O'Brien. Civil Defence. London: Majesty's Stationary Office & Longman, 1955.

MLA (8th ed.) Citation

O'Brien. Civil Defence. Majesty's Stationary Office & Longman, 1955.

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