APA

Whitmore F. C., Williams M. E. & Geological Survey (U.S.). (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. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey.

Chicago

Whitmore Frank C, Williams M E and Geological Survey (U.S.). 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. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey.

Harvard

Whitmore F. C., Williams M. E. and Geological Survey (U.S.). (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. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey.

MLA

Whitmore Frank C, Williams M E and Geological Survey (U.S.). 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. [Reston, Va.]: U.S. Department of the Interior, U.S. Geological Survey. 1982.