Krugman, P. R. (1994). International economics: Theory and policy. New York: HarperCollins College Publishers.
Trích dẫn kiểu ChicagoKrugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.
Deismireacht MLAKrugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.
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