Não informado. Population Reports. George Washington University, Department of Medical and Public Affairs.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Population Reports. Washington: George Washington University, Department of Medical and Public Affairs.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Population Reports. George Washington University, Department of Medical and Public Affairs.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.