VALENTINE, L. M., & VALENTINE, L. M. (1983). Business Cycles And Forecasting Lloyd M. Valentine And Carl A. Dauten. South-Western Publishing Co..
Lua i Stíl Chicago (17ú heag.)VALENTINE, Lloyd M., agus Lloyd M. VALENTINE. Business Cycles And Forecasting Lloyd M. Valentine And Carl A. Dauten. South-Western Publishing Co., 1983.
Lua MLA (8ú heag.)VALENTINE, Lloyd M., agus Lloyd M. VALENTINE. Business Cycles And Forecasting Lloyd M. Valentine And Carl A. Dauten. South-Western Publishing Co., 1983.
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