APA (7th ed.) Citation

Charlton, L., Garratt, G., & Fletcher, R. (1938). The air defence of Britain. Penguin.

Chicago Style (17th ed.) Citation

Charlton, L.E.O, G.T Garratt, and R. Fletcher. The Air Defence of Britain. Harmondsworth: Penguin, 1938.

MLA (8th ed.) Citation

Charlton, L.E.O, et al. The Air Defence of Britain. Penguin, 1938.