APA (7th ed.) Citation

Weltgesundheitsorganisation. (2011). Guidelines for drinking-water quality (4. ed.).

Chicago Style (17th ed.) Citation

Weltgesundheitsorganisation. Guidelines for Drinking-water Quality. 4. ed. Geneva, 2011.

MLA (9th ed.) Citation

Weltgesundheitsorganisation. Guidelines for Drinking-water Quality. 4. ed. 2011.