.Knight, J. B., & .Sabot, R. H. (1990). Education, productivity, and inequality: The East African natural experiment. Published for the World Bank, Oxford University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر).Knight, John B., و Richard H. .Sabot. Education, Productivity, and Inequality: The East African Natural Experiment. Oxford ; New York: Published for the World Bank, Oxford University Press, 1990.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع).Knight, John B., و Richard H. .Sabot. Education, Productivity, and Inequality: The East African Natural Experiment. Published for the World Bank, Oxford University Press, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.