APA引文

United States. Civil Aeronautics Authority. (1939). Directory of airports and seaplane bases. U.S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

United States. Civil Aeronautics Authority. Directory of Airports and Seaplane Bases. Washington: U.S. Govt. Print. Off., 1939.

MLA引文

United States. Civil Aeronautics Authority. Directory of Airports and Seaplane Bases. U.S. Govt. Print. Off., 1939.

警告：這些引文格式不一定是100％准確.