Cita APA (7th ed.)

World Health Organization & ebrary, Inc. (2009). Calcium and magnesium in drinking-water: Public health significance. World Health Organization.

Cita Chicago (17th ed.)

World Health Organization i Inc ebrary. Calcium and Magnesium in Drinking-water: Public Health Significance. Geneva, Switzerland: World Health Organization, 2009.

Cita MLA (9th ed.)

World Health Organization i Inc ebrary. Calcium and Magnesium in Drinking-water: Public Health Significance. World Health Organization, 2009.