APA (7th ed.) Citation

United States. Civil Aeronautics Authority. (1939). Air Commerce Bulletin, Vol. 10, No. 9. [s.n.].

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Authority. Air Commerce Bulletin, Vol. 10, No. 9. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Civil Aeronautics Authority. Air Commerce Bulletin, Vol. 10, No. 9. [s.n.], 1939.