Sandy, R. (1990). Statistics for business and economics. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Sandy, Robert. Statistics for Business and Economics. New York: McGraw-Hill, 1990.
Lua MLA (9ú heag.)Sandy, Robert. Statistics for Business and Economics. McGraw-Hill, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.