Eby, F. H., & O'neill, W. J. (1977). Management of sales forecasting. Lexington.
Čikaški stil citiranjaEby, Frank H., i William J. O'neill. Management of Sales Forecasting. Lexington: Lexington, 1977.
MLA način citiranjaEby, Frank H., i William J. O'neill. Management of Sales Forecasting. Lexington, 1977.
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