APA (7th ed.) Citation

U.S. Army Engineer School. (1951). Roads and airfields. [publisher not identified].

Chicago Style (17th ed.) Citation

U.S. Army Engineer School. Roads and Airfields. Fort Belvoir, Va.: [publisher not identified], 1951.

MLA (9th ed.) Citation

U.S. Army Engineer School. Roads and Airfields. [publisher not identified], 1951.