APA (7th ed.) Citation

Hearn, P. (1990). The sky people: A history of parachuting. Airlife.

Chicago Style (17th ed.) Citation

Hearn, Peter. The Sky People: A History of Parachuting. Shrewbury, UK: Airlife, 1990.

MLA (9th ed.) Citation

Hearn, Peter. The Sky People: A History of Parachuting. Airlife, 1990.

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