Catholic Church. Pope (1939-1958: Pius XII) & Catholic Church. Pope (1963-1978 : Paul VI). (1953). Six social documents of His Holiness Pope Pius XII: And a letter of His Excellency Monsignor Montini. Our Sunday Visitor Press.
Chicago Style (17th ed.) CitationCatholic Church. Pope (1939-1958: Pius XII) and Catholic Church. Pope (1963-1978 : Paul VI). Six Social Documents of His Holiness Pope Pius XII: And a Letter of His Excellency Monsignor Montini. Huntington, Ind.: Our Sunday Visitor Press, 1953.
MLA (8th ed.) CitationCatholic Church. Pope (1939-1958: Pius XII) and Catholic Church. Pope (1963-1978 : Paul VI). Six Social Documents of His Holiness Pope Pius XII: And a Letter of His Excellency Monsignor Montini. Our Sunday Visitor Press, 1953.
Warning: These citations may not always be 100% accurate.