Preston, R. S. (1972). The Wharton annual and industry forecasting model. Economics Research Unit, University of Pennsylvania.
Citación estilo ChicagoPreston, Ross S. The Wharton Annual and Industry Forecasting Model. Philadelphia: Economics Research Unit, University of Pennsylvania, 1972.
Cita MLAPreston, Ross S. The Wharton Annual and Industry Forecasting Model. Economics Research Unit, University of Pennsylvania, 1972.
Warning: These citations may not always be 100% accurate.