National Bureau of Economic Research. (1960). Trends in the American Economy in the 19th century Vol.24: Studies in income and wealth (24.).
শিকাগো স্টাইলে সাইটেশনNational Bureau of Economic Research. Trends in the American Economy in the 19th Century Vol.24: Studies in Income and Wealth. 24. Princeton University Press, Princeton, 1960.
এমএলএ সাইটেশনNational Bureau of Economic Research. Trends in the American Economy in the 19th Century Vol.24: Studies in Income and Wealth. 24. 1960.
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