APA (7th ed.) Citation

United States. Army Map Service. (1948). Illinois 1: 25,000. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army Map Service. Illinois 1: 25,000. Washington: [publisher not identified], 1948.

MLA (9th ed.) Citation

United States. Army Map Service. Illinois 1: 25,000. [publisher not identified], 1948.

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