Bowerman, B. L., & O`Connell, R. T. (2007). Business statistics in practice: With additional examples and exercises and selected appendices, megastat software and other contributions (4th ed.). McGraw-Hill.

Bowerman, Bruce L., and Richard T. O`Connell. Business Statistics in Practice: With Additional Examples and Exercises and Selected Appendices, Megastat Software and Other Contributions. 4th ed. Boston, MA: McGraw-Hill, 2007.

Bowerman, Bruce L., and Richard T. O`Connell. Business Statistics in Practice: With Additional Examples and Exercises and Selected Appendices, Megastat Software and Other Contributions. 4th ed. McGraw-Hill, 2007.