World Health Organization. (2012). Water safety planning for small community water supplies: Step-by-step risk management guidance for drinking water supplies in small communities. World Health Organization.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Health Organization. Water Safety Planning for Small Community Water Supplies: Step-by-step Risk Management Guidance for Drinking Water Supplies in Small Communities. Geneva, Switzerland: World Health Organization, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)World Health Organization. Water Safety Planning for Small Community Water Supplies: Step-by-step Risk Management Guidance for Drinking Water Supplies in Small Communities. World Health Organization, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.