(1976). Forecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रForecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रForecasting For Business Methods And Aplications, Longman Business Series, Douglas Wood, Robert Fildes. Longman, 1976.
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