John XXIII, P. (1959). The Holy Father speaks to teachers. National Catholic Welfare Conference.
Lua i Stíl Chicago (17ú heag.)John XXIII, Pope. The Holy Father Speaks to Teachers. Washington, D.C.: National Catholic Welfare Conference, 1959.
Lua MLA (8ú heag.)John XXIII, Pope. The Holy Father Speaks to Teachers. National Catholic Welfare Conference, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.