Anderson, D. R., Sweeney, D. J., & Williams, T. A. (1993). Statistics for business and economics (5th ed.). West Publishing Co..

Anderson, David Ray, Dennis J. Sweeney, and Thomas Arthur Williams. Statistics for Business and Economics. 5th ed. Minneapolis: West Publishing Co., 1993.

Anderson, David Ray, et al. Statistics for Business and Economics. 5th ed. West Publishing Co., 1993.