APA (7th ed.) Citation

Liberatore, E. K. (1998). Helicopters before helicopters / E.K. Liberatore. Krieger Publishing.

Chicago Style (17th ed.) Citation

Liberatore, E. K. Helicopters Before Helicopters / E.K. Liberatore. Malabar, Fla.: Krieger Publishing, 1998.

MLA (9th ed.) Citation

Liberatore, E. K. Helicopters Before Helicopters / E.K. Liberatore. Krieger Publishing, 1998.

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