APA (7th ed.) Citation

Geological Survey (U.S.). (1999). Digital raster graphics. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Digital Raster Graphics. [Rolla, Mo.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

MLA (9th ed.) Citation

Geological Survey (U.S.). Digital Raster Graphics. U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

Warning: These citations may not always be 100% accurate.