World Health Organization. (1999). Guidelines for drinking-water quality, volume 3: Surveillance and control of community supplies (2nd ed.). World Health Organization.
Citação norma ChicagoWorld Health Organization. Guidelines for Drinking-water Quality, Volume 3: Surveillance and Control of Community Supplies. 2nd ed. Geneva: World Health Organization, 1999.
Citação norma MLAWorld Health Organization. Guidelines for Drinking-water Quality, Volume 3: Surveillance and Control of Community Supplies. 2nd ed. World Health Organization, 1999.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.