Não informado. Research in Public Health Administration. Johns Hopkins University, School of Hygiene and Public Health.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Research in Public Health Administration. Baltimore, Md: Johns Hopkins University, School of Hygiene and Public Health.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Research in Public Health Administration. Johns Hopkins University, School of Hygiene and Public Health.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.