Gaya APA

Morris, C, C., Simon, T, P. (2012). Nutrient Indicator Models for Determining Biologically Relevant Levels : A Case Study Based on the Corn Belt and Northern Great Plain Nutrient Ecoregion . London:: London : Springer, 2012.

Gaya MLA

Morris, Charles, Clarence., Simon, Thomas, Paul. "Nutrient Indicator Models for Determining Biologically Relevant Levels : A Case Study Based on the Corn Belt and Northern Great Plain Nutrient Ecoregion". London:: London : Springer, 2012, 2012. Text.