Du Boulay, S. (1998). Beyond the darkness: A biography of Bede Griffiths (1st ed. in the United States of America.). Doubleday.
Lua i Stíl Chicago (17ú heag.)Du Boulay, Shirley. Beyond the Darkness: A Biography of Bede Griffiths. 1st ed. in the United States of America. New York: Doubleday, 1998.
Lua MLA (8ú heag.)Du Boulay, Shirley. Beyond the Darkness: A Biography of Bede Griffiths. 1st ed. in the United States of America. Doubleday, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.