Newbold, P., Carlson, W. L., & Thorne, B. (2020). Statistics for business and economics (Ninth edition.). Pearson.

Newbold, Paul, William L. Carlson, and Betty Thorne. Statistics for Business and Economics. Ninth edition. Harlow, England: Pearson, 2020.

Newbold, Paul, et al. Statistics for Business and Economics. Ninth edition. Pearson, 2020.