Gaya APA

Makridakis, S, G., Wheelwright, S, C. (1989). Forecasting Methods for Management Fifth Edition . United States of America: John Wiley & Sons Ltd..

Gaya MLA

Makridakis, Spyros, G.., Wheelwright, Steven, C.. "Forecasting Methods for Management Fifth Edition". United States of America: John Wiley & Sons Ltd., 1989. Text.