U.S. Environmental Protection Agency .2007. http://www.epa.gov/waterqualitytrading/WQTToolkit.html

Connecticut Department of Environmental Protection. 2001. Nitrogen Credit Exchange: CTDEP Fact Sheet. Hartford, Connecticut.  http://www.epa.gov/ne/tmdl/assets/pdfs/ct/liscreditexchange.pdf.

North Carolina Division of Water Quality. 2003a. Neuse River Basin nutrient sensitive waters management strategy: waste water discharge requirements.  http://h2o.enr.state.nc.us/nps/2b-0234.pdf.

North Carolina Division of Water Quality. 2003b. Nonpoint source management program: The Neuse Nutrient strategy.  http://h2o.enr.state.ne.us/Neuse_NSW_Rules.htm.

Pennsylvania Department of Environmental Protection. 2007. Nutrient and sediment reduction credit trading interim final policy and guidelines. http://www.dep.state.pa.us/river/Nutrient%20trading.htm.

Idaho Department of Environmental Quality. 2005. Water quality trading in Idaho. http://www.deq.state.id.us/water/prog_issues/waste_water/pollutant_trading/

Ross & Associates Environmental Consulting, Ltd. 2000. Lower Boise River effluent trading demonstration project: summary of participant recommendations for a trading framework. Prepared for the Idaho Division of Environmental Quality. Assessed: March 29, 2006. http://www.deq.idaho.gov/water/data_reports/surface_water/tmdls/boise_river_lower/boise_river_lower_effluent_report.pdf.

Conservation Information Technology Center (2006). “Getting Paid for Stewardship: An Agricultural Community Water Quality Trading Guide.” http://www.conservationinformation.org/images/GPfS_FINAL.pdf

Environmental Protection Agency. “Water Quality Trading.” http://www.epa.gov/owow/watershed/trading.htm

Environmental Trading Network. http://www.envtn.org/ 

Fisher-Vanden, Karen and Claire Schary. “A New Approach to Water Quality Trading: Applying lessons from the Acid Rain Program to the lower Boise River Watershed.” Environmental Practice 6 (4) December 2004: 281-295. http://journals.cambridge.org/download.php?file=%2FENP%2FENP6_04%2FS1466046604000468a.pdf&code=28c3644063bccb0da8274c4fdfabca59

National Wildlife Federation. “A New Tool for Water Quality – Making Watershed ~ Based Trading Work for You.” June 1999. (Su has this file to link to)

PPI (Progressive Policy Institute). “ Model Initiatives: Water Quality Trading.” May 14, 2004. http://www.ppionline.org/ppi_ci.cfm?knlgAreaID=116&subsecID=900039&contentID=252637

USDA. Water Quality Trading http://www.nal.usda.gov/wqic/Bibliographies/trading.html