APA (7th ed.) Citation

United States. Army. Air Corps. (1923). Air Service directory. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Air Service Directory. [Washington]: [publisher not identified], 1923.

MLA (9th ed.) Citation

United States. Army. Air Corps. Air Service Directory. [publisher not identified], 1923.

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