Walton, G. M., & Wykoff, F. C. (1996). Understanding economics today (5th ed.). Irwin.
Lua i Stíl Chicago (17ú heag.)Walton, Gary M., agus Frank C. Wykoff. Understanding Economics Today. 5th ed. Chicago: Irwin, 1996.
Lua MLA (9ú heag.)Walton, Gary M., agus Frank C. Wykoff. Understanding Economics Today. 5th ed. Irwin, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.