Gaya APA

Marino, K, E. (1989). Forecasting Your Company's Sales & Profits (Quickly, Easily, And Realistically) . Cichago: Probus Publishing Company.

Gaya MLA

Marino, Kenneth, E.. "Forecasting Your Company's Sales & Profits (Quickly, Easily, And Realistically)". Cichago: Probus Publishing Company, 1989. Buku.