Newbold, P. (1990). Introductory business forecasting. South-Western Publishing Co.
Citazione stile Chigago Style (17a edizione)Newbold, Paul. Introductory Business Forecasting. Cincinnati, OH: South-Western Publishing Co, 1990.
Citatione MLA (9a ed.)Newbold, Paul. Introductory Business Forecasting. South-Western Publishing Co, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.