APA (7th ed.) Citation

Spenser, J. P. (1998). Whirlybirds: A history of the U.S. helicopter pioneers. University of Washington Press in association with Museum of Flight.

Chicago Style (17th ed.) Citation

Spenser, Jay P. Whirlybirds: A History of the U.S. Helicopter Pioneers. Seattle: University of Washington Press in association with Museum of Flight, 1998.

MLA (9th ed.) Citation

Spenser, Jay P. Whirlybirds: A History of the U.S. Helicopter Pioneers. University of Washington Press in association with Museum of Flight, 1998.