Pius XII, P. (1957). States of perfection: Address of His Holiness Pope Pius XII to the Second General Congress of the States of Perfection, December 12, 1957. National Catholic Welfare Conference.
Lua i Stíl Chicago (17ú heag.)Pius XII, Pope. States of Perfection: Address of His Holiness Pope Pius XII to the Second General Congress of the States of Perfection, December 12, 1957. Washington: National Catholic Welfare Conference, 1957.
Lua MLA (8ú heag.)Pius XII, Pope. States of Perfection: Address of His Holiness Pope Pius XII to the Second General Congress of the States of Perfection, December 12, 1957. National Catholic Welfare Conference, 1957.
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