Samuelson, P. A. (2005). Economics (7th omson.). Thomson.
Lua i Stíl Chicago (17ú heag.)Samuelson, Paul A. Economics. 7th omson. South- Western/Th Learning: Thomson, 2005.
Lua MLA (9ú heag.)Samuelson, Paul A. Economics. 7th omson. Thomson, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.