Dyfyniad APA

Pugel, T. A. (2007). International economics (Thirteenth edition.). McGraw-Hill Irwin.

Dyfyniad Arddull Chicago

Pugel, Thomas A. International Economics. Thirteenth edition. Boston: McGraw-Hill Irwin, 2007.

Dyfyniad MLA

Pugel, Thomas A. International Economics. Thirteenth edition. McGraw-Hill Irwin, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.