World Health Organization. (2011). Helminth control in school-age children: A guide for managers of control programmes (2nd.). World Health Organization.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Health Organization. Helminth Control in School-age Children: A Guide for Managers of Control Programmes. 2nd. 2011: World Health Organization, 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)World Health Organization. Helminth Control in School-age Children: A Guide for Managers of Control Programmes. 2nd. World Health Organization, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.