World Health Organization. (2009). Calcium and magnesium in drinking water: Public health significance (Primera edición.). World Health Organization.
Citace podle Chicago (17th ed.)World Health Organization. Calcium and Magnesium in Drinking Water: Public Health Significance. Primera edición. Geneva: World Health Organization, 2009.
Citace podle MLA (8th ed.)World Health Organization. Calcium and Magnesium in Drinking Water: Public Health Significance. Primera edición. World Health Organization, 2009.
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