Bowerman, B. L., Murphree, E., & O'Connell, R. T. Business statistics in practice / Bruce L. Bowerman, Richard T. O'Connell, Emily S. Murphree ; with major contributions by Steven C. Huchendorf, Dawn C. Porter, Patrick J. Schur. (6th ed.). New York, NY : McGraw-Hill/Irwin, 2011.

Bowerman, Bruce L., Emily Murphree, and Richard T. O'Connell. Business Statistics in Practice / Bruce L. Bowerman, Richard T. O'Connell, Emily S. Murphree ; With Major Contributions By Steven C. Huchendorf, Dawn C. Porter, Patrick J. Schur. 6th ed. New York, NY : McGraw-Hill/Irwin, 2011.

Bowerman, Bruce L., Emily Murphree, and Richard T. O'Connell. Business Statistics in Practice / Bruce L. Bowerman, Richard T. O'Connell, Emily S. Murphree ; With Major Contributions By Steven C. Huchendorf, Dawn C. Porter, Patrick J. Schur. 6th ed. New York, NY : McGraw-Hill/Irwin, 2011.