Hanke, J. E., & Wichern, D. W. (2005). Business forecasting (8th ed.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Hanke, John E., agus Dean W. Wichern. Business Forecasting. 8th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2005.
Lua MLA (8ú heag.)Hanke, John E., agus Dean W. Wichern. Business Forecasting. 8th ed. Pearson/Prentice Hall, 2005.
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