Newbold, P., Carlson, W. L., & Thorne, B. (2007). Statistics for business and economics (6th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Newbold, Paul, William L. Carlson, agus Betty Thorne. Statistics for Business and Economics. 6th ed. Upper Saddle River, N.J.: Prentice Hall, 2007.
Lua MLA (8ú heag.)Newbold, Paul, et al. Statistics for Business and Economics. 6th ed. Prentice Hall, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.