Skager, R. W. (1978). Lifelong education and evaluation practice: A study on the development of a framework for designing evaluation systems at the school stage in the perspective of lifelong education. Published for UNESCO Institute for Education by Pergamon Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Skager, Rodney W. Lifelong Education and Evaluation Practice: A Study on the Development of a Framework for Designing Evaluation Systems at the School Stage in the Perspective of Lifelong Education. Oxford ; New York: Published for UNESCO Institute for Education by Pergamon Press, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Skager, Rodney W. Lifelong Education and Evaluation Practice: A Study on the Development of a Framework for Designing Evaluation Systems at the School Stage in the Perspective of Lifelong Education. Published for UNESCO Institute for Education by Pergamon Press, 1978.