(1969). Technological forecasting and social change. New York : American Elsevier.
Lua i Stíl Chicago (17ú heag.)Technological Forecasting and Social Change. New York : American Elsevier, 1969.
Lua MLA (9ú heag.)Technological Forecasting and Social Change. New York : American Elsevier, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.