DuFour, R., & DuFour, R. B. (2012). Essentials for principals: The school leader's guide to professional learning communities at work. Solution Tree Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)DuFour, Richard, و Rebecca Burnette DuFour. Essentials for Principals: The School Leader's Guide to Professional Learning Communities at Work. Bloomington, Ind.: Solution Tree Press, 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)DuFour, Richard, و Rebecca Burnette DuFour. Essentials for Principals: The School Leader's Guide to Professional Learning Communities at Work. Solution Tree Press, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.