World Health Organization. (2012). Persisting pain in children: Important information for physicians and nurses. World Health Organization.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Health Organization. Persisting Pain in Children: Important Information for Physicians and Nurses. Geneva, Switzerland: World Health Organization, 2012.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)World Health Organization. Persisting Pain in Children: Important Information for Physicians and Nurses. World Health Organization, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.