APA (7th ed.) Citation

(1999). Historic trail map of the Denver 1 ̊x 2 ̊quadrangle, Central Colorado: Prepared in cooperation with the Denver Public Library, Western History and Genealogy Department. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Historic Trail Map of the Denver 1 ̊x 2 ̊quadrangle, Central Colorado: Prepared in Cooperation with the Denver Public Library, Western History and Genealogy Department. Reston, Va: U.S. Geological Survey, 1999.

MLA (9th ed.) Citation

Historic Trail Map of the Denver 1 ̊x 2 ̊quadrangle, Central Colorado: Prepared in Cooperation with the Denver Public Library, Western History and Genealogy Department. U.S. Geological Survey, 1999.