Gaya APA
hanke, J, E., Reitsch, A, G.
(1998).
Business forecasting ed. 6
(
6)
.
London:
Prentice Hall.
Gaya MLA
hanke, John, E., Reitsch, Arthur, G.
"Business forecasting ed. 6".
6
London:
Prentice Hall,
1998.
Text.