Handler, P. (1970). Biology and the future of man. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Handler, Philip. Biology and the Future of Man. New York: Oxford University Press, 1970.
Lua MLA (9ú heag.)Handler, Philip. Biology and the Future of Man. Oxford University Press, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.