Walpole, R. E., Myers, R. H., Myers, S. L., Meyers, R. H., & Meyers, S. L. (1998). Probability and statistics for engineers and scientists (6th ed.). Upper Saddle River, NJ.: Prentice-Hall International.

Walpole, Ronald E., Raymond H. Myers, Sharon L. Myers, Raymond H. Meyers, and Sharon L. Meyers. Probability and Statistics for Engineers and Scientists. 6th ed. Upper Saddle River, NJ.: Prentice-Hall International, 1998.

Walpole, Ronald E., et al. Probability and Statistics for Engineers and Scientists. 6th ed. Upper Saddle River, NJ.: Prentice-Hall International, 1998.