HANKE, J. E. (1989). Business Forecasting / John E. Hanke, Arthur G. Reitsch. Allyn & Bacon.
Lua i Stíl Chicago (17ú heag.)HANKE, John E. Business Forecasting / John E. Hanke, Arthur G. Reitsch. Allyn & Bacon, 1989.
Lua MLA (8ú heag.)HANKE, John E. Business Forecasting / John E. Hanke, Arthur G. Reitsch. Allyn & Bacon, 1989.
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