Lua APA (7ú heag.)

(1976). Forecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman.

Lua i Stíl Chicago (17ú heag.)

Forecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman, 1976.

Lua MLA (8ú heag.)

Forecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman, 1976.

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