Watson, C. J., & Billingsley, P. j. a. (1990). Statistics for Management and Economics (4th.). Allyn and Bacon.
Čikaški stil citiranja (17. izdanje)Watson, Collin J., i Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Boston: Allyn and Bacon, 1990.
MLA način citiranja (9. izdanje)Watson, Collin J., i Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Allyn and Bacon, 1990.
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