Costa, D. L. (1998). Understanding the twentieth century decline in chronic conditions among older men. National Bureau of Economic Research.
Цитирование в стиле Чикаго (17-е изд.)Costa, Dora L. Understanding the Twentieth Century Decline in Chronic Conditions Among Older Men. Cambridge: National Bureau of Economic Research, 1998.
Цитирование MLA (9-е изд.)Costa, Dora L. Understanding the Twentieth Century Decline in Chronic Conditions Among Older Men. National Bureau of Economic Research, 1998.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.