APA (7th ed.) Citation

Geological Survey (U.S.). (1991). Maps can help you trace your family tree: How to use maps in genealogy. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Maps Can Help You Trace Your Family Tree: How to Use Maps in Genealogy. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1991.

MLA (9th ed.) Citation

Geological Survey (U.S.). Maps Can Help You Trace Your Family Tree: How to Use Maps in Genealogy. U.S. Dept. of the Interior, U.S. Geological Survey, 1991.