Bell, D. (1969). Toward the year 2000: Work in progress. Beacon Press.
Lua i Stíl Chicago (17ú heag.)Bell, Daniel. Toward the Year 2000: Work in Progress. Boston: Beacon Press, 1969.
Lua MLA (9ú heag.)Bell, Daniel. Toward the Year 2000: Work in Progress. Beacon Press, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.