Ascher, W. (1978). Forecasting: An appraisal for policy-makers and planners. Johns Hopkins University Press.
Chicago-viite (17. p.)Ascher, William. Forecasting: An Appraisal for Policy-makers and Planners. Baltimore: Johns Hopkins University Press, 1978.
MLA-viite (9. p.)Ascher, William. Forecasting: An Appraisal for Policy-makers and Planners. Johns Hopkins University Press, 1978.
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