Jaspers, K. (1961). The future of mankind. University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Jaspers, Karl. The Future of Mankind. [Chicago]: University of Chicago Press, 1961.
Lua MLA (9ú heag.)Jaspers, Karl. The Future of Mankind. University of Chicago Press, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.