APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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