APA (7th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. (1974). United States air transportation system, routes certificated to local service carriers: March 31, 1974. The Board.

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. United States Air Transportation System, Routes Certificated to Local Service Carriers: March 31, 1974. [Washington, D.C.: The Board, 1974.

MLA (8th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. United States Air Transportation System, Routes Certificated to Local Service Carriers: March 31, 1974. The Board, 1974.

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