Sloman, J. (2006). Economics (6th ed.). Pearson Education.
Lua i Stíl Chicago (17ú heag.)Sloman, John. Economics. 6th ed. New Delhi: Pearson Education, 2006.
Lua MLA (8ú heag.)Sloman, John. Economics. 6th ed. Pearson Education, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.