ARNORLD, R. A. (1986). Economics. West Publishing Company.
Lua i Stíl Chicago (17ú heag.)ARNORLD, Roger A. Economics. New York: West Publishing Company, 1986.
Lua MLA (9ú heag.)ARNORLD, Roger A. Economics. West Publishing Company, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.