Business forecasting / John E. Hanke ; Arthur G. Reitsch ; Dean W. Wichern. (2004). Upper Saddle River, NJ: Prentice-Hall, c.
Business forecasting / John E. Hanke ; Arthur G. Reitsch ; Dean W. Wichern. 7th ed.. Upper Saddle River, NJ: Prentice-Hall, c, 2004. Buku Wajib.