Roark, D. M. (1977). Dietrich Bonhoeffer. Word Books.
Lua i Stíl Chicago (17ú heag.)Roark, Dallas M. Dietrich Bonhoeffer. Word Books, 1977.
Lua MLA (9ú heag.)Roark, Dallas M. Dietrich Bonhoeffer. Word Books, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.