Watson, C. J., & Billingsley, P. j. a. (1990). Statistics for Management and Economics (4th.). Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Watson, Collin J., agus Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Boston: Allyn and Bacon, 1990.
Lua MLA (9ú heag.)Watson, Collin J., agus Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Allyn and Bacon, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.