1. Anonymous, 2013a. Use of Water in Food and Agriculture. 〈http://www.lenntech.com/water-food-agriculture.htm〉.
2. Anonymous, 2013b. Water Consumption-Sources and Methods. 〈www.worldometers.info/water〉.
3. Anonymous, 2013c How Much Water is Needed to Produce Food and How Much do we Waste?
4. Anonymous, 2013d. USGS, Some Irrigation Methods. 〈http://ga.water.usgs.gov/edu/irquicklook.html〉.
5. Anonymous, 2013e. Water Use in Agriculture. 〈http://www.unilever.com/sustainable-living/water/agriculture〉.