McClave, J. T. (1991). Statistics for business and economics (5th ed.). Dellen Publishing Company.
Lua i Stíl Chicago (17ú heag.)McClave, James T. Statistics for Business and Economics. 5th ed. San Fransisco: Dellen Publishing Company, 1991.
Lua MLA (9ú heag.)McClave, James T. Statistics for Business and Economics. 5th ed. Dellen Publishing Company, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.