APA (7th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. (1971). Certificated Alaska air routes: December 31, 1971.

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. Certificated Alaska Air Routes: December 31, 1971. [Washington, 1971.

MLA (8th ed.) Citation

United States. Civil Aeronautics Board. Office of Facilities and Operations. Certificated Alaska Air Routes: December 31, 1971. 1971.