Bowers, D. (1991). Statistics for economics and business. Macmillan.
Lua i Stíl Chicago (17ú heag.)Bowers, David. Statistics for Economics and Business. Hampshire: Macmillan, 1991.
Lua MLA (9ú heag.)Bowers, David. Statistics for Economics and Business. Macmillan, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.