APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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