1. Handbook of Water Analysis
2. World Health Organization (WHO) 2006
3. The Council of European Union (CEU) Council Directive 2006/118/EC of 12 December 2006, on Protection of Groundwater Contamination and Degradation 2006
4. World Health Organization (WHO) Classification of Pesticides by Hazard and Guidelines to Classification: 2009
5. The Council of European Union (CEU) Council Directive 98/83/EC of 3 November 1998, on the Quality of Water Intended for Human Consumption 1998