APA (7th ed.) Citation

Walters, M. O. (1944). Combat in the air. Appleton.

Chicago Style (17th ed.) Citation

Walters, Maude Owens. Combat in the Air. New York: Appleton, 1944.

MLA (9th ed.) Citation

Walters, Maude Owens. Combat in the Air. Appleton, 1944.