(2000). Distribution of Public School Teachers by Collaborative Activities. U.S. Department of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Distribution of Public School Teachers by Collaborative Activities. U.S. Department of Education, 2000.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Distribution of Public School Teachers by Collaborative Activities. U.S. Department of Education, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.