APA (7e ed.) Bronvermelding

Hanke, J. E. (2005). Business Forecasting. Cengage Learning.

Chicago (17e ed.) Bronvermelding

Hanke, John E. Business Forecasting. New Delhi: Cengage Learning, 2005.

MLA (9e ed.) Bronvermelding

Hanke, John E. Business Forecasting. Cengage Learning, 2005.