APA (7th ed.) Citation

United States. Army. Signal Corps. (1918). Elementary principles of radio telegraphy and telephony. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Elementary Principles of Radio Telegraphy and Telephony. Washington: [publisher not identified], 1918.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Elementary Principles of Radio Telegraphy and Telephony. [publisher not identified], 1918.

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