World Health Organization, International Water Association, & Bartram, J. (2009). Water safety plan manual: Step-by-step risk management for drinking-water suppliers. World Health Organization.
Cita Chicago (17th ed.)World Health Organization, International Water Association, i Jamie Bartram. Water Safety Plan Manual: Step-by-step Risk Management for Drinking-water Suppliers. Geneva: World Health Organization, 2009.
Cita MLA (9th ed.)World Health Organization, et al. Water Safety Plan Manual: Step-by-step Risk Management for Drinking-water Suppliers. World Health Organization, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.