Lipsey, R. (1999). Principles of economics. O U P.
Lua i Stíl Chicago (17ú heag.)Lipsey, Richard. Principles of Economics. Oxford: O U P, 1999.
Lua MLA (9ú heag.)Lipsey, Richard. Principles of Economics. O U P, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.