James, C. L. (1940). An outline of the principles of economics. New York: Barnes & Noble.
Trích dẫn kiểu ChicagoJames, Clifford L. An Outline of the Principles of Economics. New York: Barnes & Noble, 1940.
Deismireacht MLAJames, Clifford L. An Outline of the Principles of Economics. New York: Barnes & Noble, 1940.
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