APA-referens (7:e uppl.)

Hanke, J. E., & Wichern, D. W. (2009). Business forecasting (9th ed.). Pearson Education.

Chicago-referens (17:e uppl.)

Hanke, John E., och Dean W. Wichern. Business Forecasting. 9th ed. Upper Saddle River, N.J: Pearson Education, 2009.

MLA-referens (9:e uppl.)

Hanke, John E., och Dean W. Wichern. Business Forecasting. 9th ed. Pearson Education, 2009.