Cetron, M. J. (1969). Technological forecasting: A practical approach. New York: Technology Forecasting Institute.
Trích dẫn kiểu ChicagoCetron, Marvin J. Technological Forecasting: A Practical Approach. New York: Technology Forecasting Institute, 1969.
ציטוט MLACetron, Marvin J. Technological Forecasting: A Practical Approach. New York: Technology Forecasting Institute, 1969.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.