Wilson, J. H., & Keating, B. (1994). Business forecasting. Irwin.
Lua i Stíl Chicago (17ú heag.)Wilson, J. Holton, agus Barry Keating. Business Forecasting. Burr Ridge, Ill: Irwin, 1994.
Lua MLA (9ú heag.)Wilson, J. Holton, agus Barry Keating. Business Forecasting. Irwin, 1994.
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