Universities--National Bureau Committee for Economic Research. (1969). Demographic and economic change in developed countries: A conference of the Universities-National Bureau Committee for Economic Research. National Bureau of Economic Research, Distributed by Columbia University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Universities--National Bureau Committee for Economic Research. Demographic and Economic Change in Developed Countries: A Conference of the Universities-National Bureau Committee for Economic Research. New York ; London: National Bureau of Economic Research, Distributed by Columbia University Press, 1969.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Universities--National Bureau Committee for Economic Research. Demographic and Economic Change in Developed Countries: A Conference of the Universities-National Bureau Committee for Economic Research. National Bureau of Economic Research, Distributed by Columbia University Press, 1969.