APA (7th ed.) Citation

United States. Civil Aeronautics Board. Office of the Secretary. (1967). United States air transportation system, routes certificated to local service carriers: June 30, 1967. Civil Aeronautics Board.

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Board. Office of the Secretary. United States Air Transportation System, Routes Certificated to Local Service Carriers: June 30, 1967. [Washington: Civil Aeronautics Board, 1967.

MLA (8th ed.) Citation

United States. Civil Aeronautics Board. Office of the Secretary. United States Air Transportation System, Routes Certificated to Local Service Carriers: June 30, 1967. Civil Aeronautics Board, 1967.