APA

Dufour A., Organisation for Economic Co-operation and Development, World Health Organization & International Water Association. (2003). Assessing microbial safety of drinking water. London: Published on behalf of the World Health Organization and the Organisation for Economic Co-operation and Development by IWA Publishing.

Chicago

Dufour Al, Organisation for Economic Co-operation and Development, World Health Organization and International Water Association. 2003. Assessing microbial safety of drinking water. London: Published on behalf of the World Health Organization and the Organisation for Economic Co-operation and Development by IWA Publishing.

Harvard

Dufour A., Organisation for Economic Co-operation and Development, World Health Organization and International Water Association. (2003). Assessing microbial safety of drinking water. London: Published on behalf of the World Health Organization and the Organisation for Economic Co-operation and Development by IWA Publishing.

MLA

Dufour Al, Organisation for Economic Co-operation and Development, World Health Organization and International Water Association. Assessing microbial safety of drinking water. London: Published on behalf of the World Health Organization and the Organisation for Economic Co-operation and Development by IWA Publishing. 2003.