APA (7th ed.) Citation

Althoff, W. F. (1990). Sky ships: A history of the airship in the United States Navy. Orion Books.

Chicago Style (17th ed.) Citation

Althoff, William F. Sky Ships: A History of the Airship in the United States Navy. New York: Orion Books, 1990.

MLA (9th ed.) Citation

Althoff, William F. Sky Ships: A History of the Airship in the United States Navy. Orion Books, 1990.