Nobbs, J., & Hopkins, I. W. J. (1995). Economics: A core text (4th ed.). McGraw-Hill Book Co..
Lua i Stíl Chicago (17ú heag.)Nobbs, Jack, agus I. W. J. Hopkins. Economics: A Core Text. 4th ed. London ; New York: McGraw-Hill Book Co., 1995.
Lua MLA (8ú heag.)Nobbs, Jack, agus I. W. J. Hopkins. Economics: A Core Text. 4th ed. McGraw-Hill Book Co., 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.