Weber, E., Teal, G. K., & Schillinger, A. G. (1971). Technology forecast for 1980. Van Nostrand Reinhold Co.
Cita Chicago (17th ed.)Weber, Ernst, Gordon K. Teal, i A. George Schillinger. Technology Forecast for 1980. New York: Van Nostrand Reinhold Co, 1971.
Cita MLA (8th ed.)Weber, Ernst, et al. Technology Forecast for 1980. Van Nostrand Reinhold Co, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.