Freeman, C. (1986). Design, innovation, and long cycles in economic development. St. Martins's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFreeman, Christopher. Design, Innovation, and Long Cycles in Economic Development. New York: St. Martins's Press, 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFreeman, Christopher. Design, Innovation, and Long Cycles in Economic Development. St. Martins's Press, 1986.
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