World Health Organization. (1998). Guidelines for drinking - water quality: Recommendations (2nd-edn.). World Health Organization.
Citación estilo ChicagoWorld Health Organization. Guidelines for Drinking - Water Quality: Recommendations. 2nd-edn. Geneva: World Health Organization, 1998.
Cita MLAWorld Health Organization. Guidelines for Drinking - Water Quality: Recommendations. 2nd-edn. World Health Organization, 1998.
Warning: These citations may not always be 100% accurate.