Samuelson, P. A. (2011). Economics (19th.). Mcgraw hill.
Lua i Stíl Chicago (17ú heag.)Samuelson, Paul A. Economics. 19th. New Delhi: Mcgraw hill, 2011.
Lua MLA (9ú heag.)Samuelson, Paul A. Economics. 19th. Mcgraw hill, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.