1. Standard methods for the examination of water and wastewater;American Public Health Association,1998
2. Microbiological standards for water and their relationship to health risk;Barrell;Communicable Disease and Public Health,2000
3. Epidemiology: A tool for the assessment of risk;Blumenthal,2001
4. Quantitative microbial risk assessment: Methods and quality assurance;Boone;Flemish Veterinary Magazine,2010
5. Microbiological quality of water vending machines;Chaidez;International Journal of Environmental Health Research,1999