Keller, G. (2009). Statistics for Management. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Keller, Gerald. Statistics for Management. New Delhi: Oxford University Press, 2009.
Lua MLA (9ú heag.)Keller, Gerald. Statistics for Management. Oxford University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.