MAKRIDAKIS, S. G. (1990). Forecasting, planning, and strategy for the 21 st century. The Free Press.
Lua i Stíl Chicago (17ú heag.)MAKRIDAKIS, Spyros G. Forecasting, Planning, and Strategy for the 21 St Century. New York: The Free Press, 1990.
Lua MLA (9ú heag.)MAKRIDAKIS, Spyros G. Forecasting, Planning, and Strategy for the 21 St Century. The Free Press, 1990.
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