Gray, D. L., & Smith, A. E. (2007). Case studies in 21st century school administration: Addressing challenges for educational leadership. Sage Publications.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gray, David L., و Agnes E. Smith. Case Studies in 21st Century School Administration: Addressing Challenges for Educational Leadership. Thousand Oaks: Sage Publications, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Gray, David L., و Agnes E. Smith. Case Studies in 21st Century School Administration: Addressing Challenges for Educational Leadership. Sage Publications, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.