Cetron, M. J. (1969). Technological forecasting: A practical approach. New York: Technology Forecasting Institute.
शिकागो स्टाइल उद्धरणCetron, Marvin J. Technological Forecasting: A Practical Approach. New York: Technology Forecasting Institute, 1969.
एमएलए उद्धरणCetron, Marvin J. Technological Forecasting: A Practical Approach. New York: Technology Forecasting Institute, 1969.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.