APA (7th ed.) Citation

United States. Army Map Service & Geological Survey (U.S.). (1967). Eastern United States 1: 250,000 (1956, limited revision 1966.). U.S. Geological Survey.

Chicago Style (17th ed.) Citation

United States. Army Map Service and Geological Survey (U.S.). Eastern United States 1: 250,000. 1956, limited revision 1966. Washington, D.C.: U.S. Geological Survey, 1967.

MLA (9th ed.) Citation

United States. Army Map Service and Geological Survey (U.S.). Eastern United States 1: 250,000. 1956, limited revision 1966. U.S. Geological Survey, 1967.