APA (7th ed.) Citation

Wallace, A. R. (2013). Fluorine, fluorite, and fluorspar in central Colorado. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Wallace, Alan R. Fluorine, Fluorite, and Fluorspar in Central Colorado. Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2013.

MLA (9th ed.) Citation

Wallace, Alan R. Fluorine, Fluorite, and Fluorspar in Central Colorado. U.S. Department of the Interior, U.S. Geological Survey, 2013.