APA (7th ed.) Citation

U.S. Geological Survey. Mineral industry surveys , copper in april 2006.

Chicago Style (17th ed.) Citation

U.S. Geological Survey. Mineral Industry Surveys , Copper in April 2006.

MLA (9th ed.) Citation

U.S. Geological Survey. Mineral Industry Surveys , Copper in April 2006.

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