1. AOAC International 2012a http://www.eoma.aoac.org/appendices.asp
2. AOAC International 2012b http://www.aoac.org/vmeth/guidelines
3. Blodgett , R. 2003 Bacteriological Analytical Manual http://www.fda.gov/Food/FoodScienceResearch/LaboratoryMethods/ucm109656.htm