American Academy of Arts and Sciences (Boston). Commission on the Year 2000, Daedalus, & Bell, D. (1968). Toward the year 2000: Work in progress. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)American Academy of Arts and Sciences (Boston). Commission on the Year 2000, Daedalus, agus Daniel Bell. Toward the Year 2000: Work in Progress. Boston: Houghton Mifflin, 1968.
Lua MLA (9ú heag.)American Academy of Arts and Sciences (Boston). Commission on the Year 2000, et al. Toward the Year 2000: Work in Progress. Houghton Mifflin, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.