APA (7th ed.) Citation

Kroening, S. E. (1998). Nutrient sources within the Upper Mississippi River Basin, Minnesota and Wisconsin, 1991-93. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Kroening, Sharon E. Nutrient Sources Within the Upper Mississippi River Basin, Minnesota and Wisconsin, 1991-93. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Kroening, Sharon E. Nutrient Sources Within the Upper Mississippi River Basin, Minnesota and Wisconsin, 1991-93. U.S. Dept. of the Interior, U.S. Geological Survey, 1998.