Paul VI, P. (1964). Letter to Paolo Cardinal Marella on New York World's Fair. National Catholic Welfare Conference.
Lua i Stíl Chicago (17ú heag.)Paul VI, Pope. Letter to Paolo Cardinal Marella on New York World's Fair. Washington, D.C.: National Catholic Welfare Conference, 1964.
Lua MLA (8ú heag.)Paul VI, Pope. Letter to Paolo Cardinal Marella on New York World's Fair. National Catholic Welfare Conference, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.