O'Sullivan, H. (1991). Trends in mission: Toward the third millennium: essays in celebration of twenty-five years of SEDOS. Orbis Books.
Lua i Stíl Chicago (17ú heag.)O'Sullivan, Helene. Trends in Mission: Toward the Third Millennium: Essays in Celebration of Twenty-five Years of SEDOS. Ney York: Orbis Books, 1991.
Lua MLA (9ú heag.)O'Sullivan, Helene. Trends in Mission: Toward the Third Millennium: Essays in Celebration of Twenty-five Years of SEDOS. Orbis Books, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.