Byrns, R. T., & Stone, G. W. (1992). Economics (5th ed.). HarperCollins College Pub..
Lua i Stíl Chicago (17ú heag.)Byrns, Ralph T., agus Gerald W. Stone. Economics. 5th ed. New York: HarperCollins College Pub., 1992.
Lua MLA (9ú heag.)Byrns, Ralph T., agus Gerald W. Stone. Economics. 5th ed. HarperCollins College Pub., 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.