John Paul II, P. (1987). Unity in the work of service. National Conference of Catholic Bishops, United States Catholic Conferences.
Lua i Stíl Chicago (17ú heag.)John Paul II, Pope. Unity in the Work of Service. Washington, D.C.: National Conference of Catholic Bishops, United States Catholic Conferences, 1987.
Lua MLA (8ú heag.)John Paul II, Pope. Unity in the Work of Service. National Conference of Catholic Bishops, United States Catholic Conferences, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.