John XXIII, P. (1961). 1961 Christmas message: Address given ... on December 21, 1961. National Catholic Welfare Conference.
Style de citation Chicago (17e éd.)John XXIII, Pope. 1961 Christmas Message: Address Given ... on December 21, 1961. Washington: National Catholic Welfare Conference, 1961.
Style de citation MLA (8e éd.)John XXIII, Pope. 1961 Christmas Message: Address Given ... on December 21, 1961. National Catholic Welfare Conference, 1961.
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