Parkin, M. (2012). Economics (10th ed.). Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Parkin, Michael. Economics. 10th ed. Boston: Addison-Wesley, 2012.
Lua MLA (8ú heag.)Parkin, Michael. Economics. 10th ed. Addison-Wesley, 2012.
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