APA (7e ed.) Bronvermelding

Hanke, J. E. W. (2013). Business forecasting (8th ed.). Cengage Learning.

Chicago (17e ed.) Bronvermelding

Hanke, John E; Wichern. Business Forecasting. 8th ed. New Delhi: Cengage Learning, 2013.

MLA (9e ed.) Bronvermelding

Hanke, John E; Wichern. Business Forecasting. 8th ed. Cengage Learning, 2013.