Harris, M. (2015). Inside the crystal ball: How to make and use forecasts. Wiley.
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Chicago-čujuhus (17. p.)
Harris, Maury. Inside the Crystal Ball: How to Make and Use Forecasts. Hoboken, New Jersey: Wiley, 2015.
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MLA-čujuhus (9. p.)
Harris, Maury. Inside the Crystal Ball: How to Make and Use Forecasts. Wiley, 2015.
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