APA (7th ed.) Citation

Smith, G. I., & Howard, K. A. (1978). Climate variation and its effects on our land and water. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Smith, George I., and Keith A. Howard. Climate Variation and Its Effects on Our Land and Water. [Reston, Virginia]: United States Department of the Interior, Geological Survey, 1978.

MLA (9th ed.) Citation

Smith, George I., and Keith A. Howard. Climate Variation and Its Effects on Our Land and Water. United States Department of the Interior, Geological Survey, 1978.