World Health Organization & ebrary, Inc. (2009). Calcium and magnesium in drinking-water: Public health significance. World Health Organization.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Health Organization و Inc ebrary. Calcium and Magnesium in Drinking-water: Public Health Significance. Geneva, Switzerland: World Health Organization, 2009.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)World Health Organization و Inc ebrary. Calcium and Magnesium in Drinking-water: Public Health Significance. World Health Organization, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.