Battersby, A. (1970). Sales forecasting. penguin.
Lua i Stíl Chicago (17ú heag.)Battersby, Albert. Sales Forecasting. Middlesex: penguin, 1970.
Lua MLA (9ú heag.)Battersby, Albert. Sales Forecasting. penguin, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.