Kliever, L. D. (1977). H. Richard Niebuhr. Word Books.
Lua i Stíl Chicago (17ú heag.)Kliever, Lonnie D. H. Richard Niebuhr. Waco, Tex.: Word Books, 1977.
Lua MLA (9ú heag.)Kliever, Lonnie D. H. Richard Niebuhr. Word Books, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.