APA (7th ed.) Citation

Geological Survey (U.S.). (2002). Using maps in genealogy. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Using Maps in Genealogy. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

MLA (9th ed.) Citation

Geological Survey (U.S.). Using Maps in Genealogy. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.