Pugel, T. A. (2007). International economics (Thirteenth edition.). McGraw-Hill Irwin.
Dyfyniad Arddull ChicagoPugel, Thomas A. International Economics. Thirteenth edition. Boston: McGraw-Hill Irwin, 2007.
Dyfyniad MLAPugel, Thomas A. International Economics. Thirteenth edition. McGraw-Hill Irwin, 2007.
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