Ingram, J. C. (1978). International economic problem. New York: John Wiely and Sons.
Trích dẫn kiểu ChicagoIngram, James C. International Economic Problem. New York: John Wiely and Sons, 1978.
Deismireacht MLAIngram, James C. International Economic Problem. New York: John Wiely and Sons, 1978.
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