Harris, M. (2015). Inside the crystal ball: How to make and use forecasts. Wiley.
Citazione stile Chigago Style (17a edizione)Harris, Maury. Inside the Crystal Ball: How to Make and Use Forecasts. Hoboken, New Jersey: Wiley, 2015.
Citatione MLA (9a ed.)Harris, Maury. Inside the Crystal Ball: How to Make and Use Forecasts. Wiley, 2015.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.