Cita APA (7th ed.)

World Health organization. (2006). Guidelines for drinking - water quality: Recommendations. World Health Organization.

Cita Chicago (17th ed.)

World Health organization. Guidelines for Drinking - Water Quality: Recommendations. Geneva: World Health Organization, 2006.

Cita MLA (8th ed.)

World Health organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 2006.