Berry, R. A., & Cline, W. R. (1979). Agrarian structure and productivity in developing countries: A study prepared for the International Labour Office within the framework of the World Employment Programme. Johns Hopkins University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Berry, R. Albert, و William R. Cline. Agrarian Structure and Productivity in Developing Countries: A Study Prepared for the International Labour Office Within the Framework of the World Employment Programme. Baltimore: Johns Hopkins University Press, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Berry, R. Albert, و William R. Cline. Agrarian Structure and Productivity in Developing Countries: A Study Prepared for the International Labour Office Within the Framework of the World Employment Programme. Johns Hopkins University Press, 1979.