Graddy, K., & Stevens, M. (2003). The Impact of School Inputs on Student Performance: An Empirical Study of Private Schools in the United Kingdom. Department of Economics (University of Oxford).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Graddy, K., و M. Stevens. The Impact of School Inputs on Student Performance: An Empirical Study of Private Schools in the United Kingdom. Department of Economics (University of Oxford), 2003.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Graddy, K., و M. Stevens. The Impact of School Inputs on Student Performance: An Empirical Study of Private Schools in the United Kingdom. Department of Economics (University of Oxford), 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.