Dyfyniad APA

Hanke, J. E., Reitsch, A. G., & Wichern, D. W. (2001). Business forecasting (7th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Hanke, John E., Arthur G. Reitsch, and Dean W. Wichern. Business Forecasting. 7th ed. Upper Saddle River, N.J: Prentice Hall, 2001.

Dyfyniad MLA

Hanke, John E., et al. Business Forecasting. 7th ed. Prentice Hall, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.