Lua APA (7ú heag.)

Pugel, T. A. (2007). International economics (13th ed.). McGraw-Hill Irwin.

Lua i Stíl Chicago (17ú heag.)

Pugel, Thomas A. International Economics. 13th ed. Boston: McGraw-Hill Irwin, 2007.

Lua MLA (8ú heag.)

Pugel, Thomas A. International Economics. 13th ed. McGraw-Hill Irwin, 2007.

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