APA (7th ed.) Citation

Amos, D. H. (1977). Geologic map of the Custer quadrangle, Breckenridge and Hardin counties, Kentucky. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Amos, Dewey Harold. Geologic Map of the Custer Quadrangle, Breckenridge and Hardin Counties, Kentucky. Reston, Va.: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

Amos, Dewey Harold. Geologic Map of the Custer Quadrangle, Breckenridge and Hardin Counties, Kentucky. U.S. Geological Survey, 1977.