APA引文

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引文

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

警告：這些引文格式不一定是100％准確.