APA (7th ed.) Citation

United States. War Department. (1929). Buzzerphone, type EE-1-A. GPO.

Chicago Style (17th ed.) Citation

United States. War Department. Buzzerphone, Type EE-1-A. [Washington]: GPO, 1929.

MLA (9th ed.) Citation

United States. War Department. Buzzerphone, Type EE-1-A. GPO, 1929.

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