(2000). Percentage of the Population who Completed Secondary & Higher Education. U.S. Department of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Percentage of the Population Who Completed Secondary & Higher Education. U.S. Department of Education, 2000.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Percentage of the Population Who Completed Secondary & Higher Education. U.S. Department of Education, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.