APA (7th ed.) Citation

United States. War Department. (1930). Signal Corps: Code practice equipment, type EE-81. GPO.

Chicago Style (17th ed.) Citation

United States. War Department. Signal Corps: Code Practice Equipment, Type EE-81. [Washington]: GPO, 1930.

MLA (9th ed.) Citation

United States. War Department. Signal Corps: Code Practice Equipment, Type EE-81. GPO, 1930.

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