(1982). Resources for the twenty-first century: Proceedings of the International Centennial Symposium of the United States Geological Survey, held at Reston, Virginia, October 14 - 19, 1979. United States Gov. Print. Off.
Chicago Style (17th ed.) CitationResources for the Twenty-first Century: Proceedings of the International Centennial Symposium of the United States Geological Survey, Held at Reston, Virginia, October 14 - 19, 1979. Washington, DC: United States Gov. Print. Off, 1982.
MLA (9th ed.) CitationResources for the Twenty-first Century: Proceedings of the International Centennial Symposium of the United States Geological Survey, Held at Reston, Virginia, October 14 - 19, 1979. United States Gov. Print. Off, 1982.
Warning: These citations may not always be 100% accurate.