APA (7th ed.) Citation

United States. Army. Signal Corps. (1921). Modification in tables of organization, 1920-1921 (Signal Corps). [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Signal Corps. Modification in Tables of Organization, 1920-1921 (Signal Corps). Washington: [publisher not identified], 1921.

MLA (9th ed.) Citation

United States. Army. Signal Corps. Modification in Tables of Organization, 1920-1921 (Signal Corps). [publisher not identified], 1921.

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