Readings In Economics Samuelson Dkk. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Readings In Economics Samuelson Dkk. McGraw-Hill.
Lua MLA (8ú heag.)Readings In Economics Samuelson Dkk. McGraw-Hill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.