LEWIS COLIN D. (1997). DEMAND FORECASTING AND INVENTORY CONTROL. JOHN WILEY AND SONS.
Lua i Stíl Chicago (17ú heag.)LEWIS COLIN D. DEMAND FORECASTING AND INVENTORY CONTROL. NEW YORK: JOHN WILEY AND SONS, 1997.
Lua MLA (9ú heag.)LEWIS COLIN D. DEMAND FORECASTING AND INVENTORY CONTROL. JOHN WILEY AND SONS, 1997.
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