APA (7th ed.) Citation

Geological Survey (U.S.). (1966). State of Alabama: Base map (Ed. of 1966.). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). State of Alabama: Base Map. Ed. of 1966. Washington, D.C.: The Survey, 1966.

MLA (9th ed.) Citation

Geological Survey (U.S.). State of Alabama: Base Map. Ed. of 1966. The Survey, 1966.