Gill, R. T. (1991). Economics and the public interest (5th ed.). Mayfield Pub. Co..
Lua i Stíl Chicago (17ú heag.)Gill, Richard T. Economics and the Public Interest. 5th ed. Mountain View, Calif.: Mayfield Pub. Co., 1991.
Lua MLA (8ú heag.)Gill, Richard T. Economics and the Public Interest. 5th ed. Mayfield Pub. Co., 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.