World health organization. (2009). Calcium and magnesium in drinking - water: Public health significance. WHO.
استشهاد بنمط شيكاغوWorld health organization. Calcium and Magnesium in Drinking - Water: Public Health Significance. Geneva: WHO, 2009.
MLA استشهادWorld health organization. Calcium and Magnesium in Drinking - Water: Public Health Significance. WHO, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.