APA (7th ed.) Citation

United States. Army. Air Corps. (1918). Oil pressure for Liberty engine on D.H. 4 airplane. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Oil Pressure for Liberty Engine on D.H. 4 Airplane. [Place of publication not identified]: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Air Corps. Oil Pressure for Liberty Engine on D.H. 4 Airplane. [publisher not identified], 1918.