APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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