APA (7th ed.) Citation

United States. Civil Aeronautics Administration. (1942). Digest of civil air regulations for pilots, 6th edition, Aug. 1942. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Administration. Digest of Civil Air Regulations for Pilots, 6th Edition, Aug. 1942. [Washington]: [publisher not identified], 1942.

MLA (9th ed.) Citation

United States. Civil Aeronautics Administration. Digest of Civil Air Regulations for Pilots, 6th Edition, Aug. 1942. [publisher not identified], 1942.