APA (7th ed.) Citation

United States. Army. Signal Corps. (1918). Theory of electron flow in vacuum tubes. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Theory of Electron Flow in Vacuum Tubes. Washington: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Theory of Electron Flow in Vacuum Tubes. [publisher not identified], 1918.

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