Dyfyniad APA

Ely, R. T., & Wicker, G. R. (1917). Elementary principles of economics: Together with a short sketch of economic history (Rev.). Macmillan.

Dyfyniad Arddull Chicago

Ely, Richard Theodore, and George Ray Wicker. Elementary Principles of Economics: Together with a Short Sketch of Economic History. Rev. New York ; London: Macmillan, 1917.

Dyfyniad MLA

Ely, Richard Theodore, and George Ray Wicker. Elementary Principles of Economics: Together with a Short Sketch of Economic History. Rev. Macmillan, 1917.

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