Niebuhr, R., & Brown, R. M. (1986). The essential Reinhold Niebuhr: Selected essays and addresses. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Niebuhr, Reinhold, agus Robert McAfee Brown. The Essential Reinhold Niebuhr: Selected Essays and Addresses. New Haven: Yale University Press, 1986.
Lua MLA (9ú heag.)Niebuhr, Reinhold, agus Robert McAfee Brown. The Essential Reinhold Niebuhr: Selected Essays and Addresses. Yale University Press, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.