SULLIVAN, W. G. (1977). Fundamentals Of Forecasting William G. Sullivan And Wayne Claycombe. Reston Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSULLIVAN, William G. Fundamentals Of Forecasting William G. Sullivan And Wayne Claycombe. Reston Publishing Company, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSULLIVAN, William G. Fundamentals Of Forecasting William G. Sullivan And Wayne Claycombe. Reston Publishing Company, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.