APA (7th ed.) Citation

United States. Army. Signal Corps. (1875). [Cipher books for use by Signal Office]. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. [Cipher Books for Use by Signal Office]. [Washington]: [publisher not identified], 1875.

MLA (9th ed.) Citation

United States. Army. Signal Corps. [Cipher Books for Use by Signal Office]. [publisher not identified], 1875.

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