APA (7th ed.) Citation

United States. Army Map Service & Geological Survey (U.S.). (1966). Eastern United States 1:250,000: NI 16-5 (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: NI 16-5. 1956, limited revision 1966. Washington, D.C.: U.S. Geological Survey, 1966.

MLA (9th ed.) Citation

United States. Army Map Service and Geological Survey (U.S.). Eastern United States 1:250,000: NI 16-5. 1956, limited revision 1966. U.S. Geological Survey, 1966.