APA (7th ed.) Citation

Nilles, M. A. (1993). External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1990. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Nilles, Mark A. External Quality-assurance Results for the National Atmospheric Deposition Program/National Trends Network During 1990. Denver, Colorado: U.S. Department of the Interior, U.S. Geological Survey, 1993.

MLA (9th ed.) Citation

Nilles, Mark A. External Quality-assurance Results for the National Atmospheric Deposition Program/National Trends Network During 1990. U.S. Department of the Interior, U.S. Geological Survey, 1993.