APA (7th ed.) Citation

Killen, J. (1969). The Luftwaffe: A history. Sphere Books.

Chicago Style (17th ed.) Citation

Killen, John. The Luftwaffe: A History. London: Sphere Books, 1969.

MLA (9th ed.) Citation

Killen, John. The Luftwaffe: A History. Sphere Books, 1969.

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