APA-referens (7:e uppl.)
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. Springer Netherlands. https://doi.org/10.1007/978-94-007-4129-4
Chicago-referens (17:e uppl.)
Morris, Charles Clarence, och Thomas Paul Simon. Nutrient Indicator Models for Determining Biologically Relevant Levels: A Case Study Based on the Corn Belt and Northern Great Plain Nutrient Ecoregion. Dordrecht: Springer Netherlands, 2012. https://doi.org/10.1007/978-94-007-4129-4.
MLA-referens (9:e uppl.)
Morris, Charles Clarence, och Thomas Paul Simon. Nutrient Indicator Models for Determining Biologically Relevant Levels: A Case Study Based on the Corn Belt and Northern Great Plain Nutrient Ecoregion. Springer Netherlands, 2012. https://doi.org/10.1007/978-94-007-4129-4.
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