APA (7th ed.) Citation

SIEFRING. (1977). U.S. Air Force: In World War II. A. P. Pub.

Chicago Style (17th ed.) Citation

SIEFRING. U.S. Air Force: In World War II. London: A. P. Pub, 1977.

MLA (8th ed.) Citation

SIEFRING. U.S. Air Force: In World War II. A. P. Pub, 1977.

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