APA (7th ed.) Citation

Fay, J. (1967). The helicopter and how it flies / by John Fay (2nd ed.). Pitman.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Fay, John. The Helicopter and How It Flies / by John Fay. 2nd ed. Pitman, 1967.

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