Freeman, C. (1986). Design, innovation, and long cycles in economic development. St. Martins's Press.
Lua i Stíl Chicago (17ú heag.)Freeman, Christopher. Design, Innovation, and Long Cycles in Economic Development. New York: St. Martins's Press, 1986.
Lua MLA (9ú heag.)Freeman, Christopher. Design, Innovation, and Long Cycles in Economic Development. St. Martins's Press, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.