Dyfyniad APA
Hanke, J. E., & Wichern, D. W. (2005). Business forecasting (8th ed.). Pearson/Prentice Hall.
Dyfyniad Arddull Chicago
Hanke, John E., and Dean W. Wichern. Business Forecasting. 8th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2005.
Dyfyniad MLA
Hanke, John E., and Dean W. Wichern. Business Forecasting. 8th ed. Pearson/Prentice Hall, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.