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Lua i Stíl Chicago (17ú heag.)Guell, Robert C. Issues in Economics Today 7 Ed. McGraw-Hill, 2015.
Lua MLA (8ú heag.)Guell, Robert C. Issues in Economics Today 7 Ed. McGraw-Hill, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.