Hanke, J. E., & Wichern, D. W. (2005). Business forecasting (8th ed.). Pearson/Prentice Hall.

Hanke, John E., and Dean W. Wichern. Business Forecasting. 8th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2005.

Hanke, John E., and Dean W. Wichern. Business Forecasting. 8th ed. Pearson/Prentice Hall, 2005.