APA-viite (7. p.)

Kolassa, S., & Siemsen, E. (2014). Demand Forecasting for Managers. Business Expert Press.

Chicago-viite (17. p.)

Kolassa, Stephan, ja Enno Siemsen. Demand Forecasting for Managers. New York: Business Expert Press, 2014.

MLA-viite (9. p.)

Kolassa, Stephan, ja Enno Siemsen. Demand Forecasting for Managers. Business Expert Press, 2014.