APA (7th ed.) Citation

Fay, J. S. (1967). The helicopter and how it flies (2. ed.). Pitman.

Chicago Style (17th ed.) Citation

Fay, John Samuel. The Helicopter and How It Flies. 2. ed. London: Pitman, 1967.

MLA (9th ed.) Citation

Fay, John Samuel. The Helicopter and How It Flies. 2. ed. Pitman, 1967.