Não informado. Selected references on environmental quality as it relates to health. National Library of Medicine.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Selected References on Environmental Quality as It Relates to Health. Bethesda, Md: National Library of Medicine.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Selected References on Environmental Quality as It Relates to Health. National Library of Medicine.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.