APA (7th ed.) Citation

Berg, H. C. (1999). Ketchikan quadrangle: Alaska resource data file. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Berg, Henry C. Ketchikan Quadrangle: Alaska Resource Data File. [Menlo Park, Calif.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1999.

MLA (9th ed.) Citation

Berg, Henry C. Ketchikan Quadrangle: Alaska Resource Data File. U.S. Dept. of the Interior, U.S. Geological Survey, 1999.