APA-referens (7:e uppl.)

Lewis, C. D. (1982). Industrial and business forecasting methods: A practical guide to exponential smoothing and curve fitting. Butterworth.

Chicago-referens (17:e uppl.)

Lewis, Colin D. Industrial and Business Forecasting Methods: A Practical Guide to Exponential Smoothing and Curve Fitting. London: Butterworth, 1982.

MLA-referens (9:e uppl.)

Lewis, Colin D. Industrial and Business Forecasting Methods: A Practical Guide to Exponential Smoothing and Curve Fitting. Butterworth, 1982.