APA (7th ed.) Citation

United States. Army. Signal Corps. (1918). Buzzerphone, type EE-1. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Buzzerphone, Type EE-1. [Place of publication not identified]: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Buzzerphone, Type EE-1. [publisher not identified], 1918.

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