APA (7th ed.) Citation

Heron, S. D. (1961). History of the aircraft piston engine / by S.D. Heron. Ethyl Corporation.

Chicago Style (17th ed.) Citation

Heron, S. D. History of the Aircraft Piston Engine / by S.D. Heron. Ethyl Corporation, 1961.

MLA (9th ed.) Citation

Heron, S. D. History of the Aircraft Piston Engine / by S.D. Heron. Ethyl Corporation, 1961.

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