APA (7th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. (1970). United States air transportation system: Routes certified to trunkline carriers, December 31, 1970. The Board.

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. United States Air Transportation System: Routes Certified to Trunkline Carriers, December 31, 1970. [Washington: The Board, 1970.

MLA (8th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. United States Air Transportation System: Routes Certified to Trunkline Carriers, December 31, 1970. The Board, 1970.

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