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Gaya APA

E.Hanke, J., G.Reitsch, A. (1938). Business Forecasting Fourth Edition . USA: A Division of Simon & Schuster, Inc.

Gaya MLA

E.Hanke, John., G.Reitsch, Arthur. "Business Forecasting Fourth Edition". USA: A Division of Simon & Schuster, Inc, 1938. Text.