Armstrong, J. S. (1978). Long-range forecasting: From crystal ball to computer. John Wiley & Sons.
Cita Chicago Style (17a ed.)Armstrong, Jon Scott. Long-range Forecasting: From Crystal Ball to Computer. New York [etc.]: John Wiley & Sons, 1978.
Cita MLA (9a ed.)Armstrong, Jon Scott. Long-range Forecasting: From Crystal Ball to Computer. John Wiley & Sons, 1978.
Precaución: Estas citas no son 100% exactas.