Copeland, M. A. (1952). A Study of moneyflows in the united states. National Bureau of Economic Research.
Chicago-viite (17. p.)Copeland, Morris A. A Study of Moneyflows in the United States. New York: National Bureau of Economic Research, 1952.
MLA-viite (9. p.)Copeland, Morris A. A Study of Moneyflows in the United States. National Bureau of Economic Research, 1952.
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