Hesburgh, T. M. (1974). The humane imperative: A challenge for the year 2000. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Hesburgh, Theodore Martin. The Humane Imperative: A Challenge for the Year 2000. New Haven, Conn: Yale University Press, 1974.
Lua MLA (9ú heag.)Hesburgh, Theodore Martin. The Humane Imperative: A Challenge for the Year 2000. Yale University Press, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.