APA (7th ed.) Citation

United States. Army. Signal Corps. (1931). Field exercise. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Field Exercise. [United States]: [publisher not identified], 1931.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Field Exercise. [publisher not identified], 1931.

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