Dyfyniad APA

Krugman, P. R. (2017). International Trade: Theory and Policy (10th.). Pearson.

Dyfyniad Arddull Chicago

Krugman, Paul R. International Trade: Theory and Policy. 10th. Pearson, 2017.

Dyfyniad MLA

Krugman, Paul R. International Trade: Theory and Policy. 10th. Pearson, 2017.

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