Bell, W. (1996). Foundations of futures studies: Human science for a new era. Transaction Publishers.
Lua i Stíl Chicago (17ú heag.)Bell, Wendell. Foundations of Futures Studies: Human Science for a New Era. New Brunswick, NJ: Transaction Publishers, 1996.
Lua MLA (9ú heag.)Bell, Wendell. Foundations of Futures Studies: Human Science for a New Era. Transaction Publishers, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.