Samuelson, P. A., & Nordhaus, W. D. (2001). Economics (17th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Samuelson, Paul Anthony, agus William D. Nordhaus. Economics. 17th ed. Boston, Mass.: McGraw-Hill, 2001.
Lua MLA (8ú heag.)Samuelson, Paul Anthony, agus William D. Nordhaus. Economics. 17th ed. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.