APA (7th ed.) Citation

United States. Army. Air Corps. (1918). Instructions for airplane radio set SCR 68. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Instructions for Airplane Radio Set SCR 68. [Place of publication not identified]: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Air Corps. Instructions for Airplane Radio Set SCR 68. [publisher not identified], 1918.

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