Catholic Church. Pope & Schaefer, M. C. (1936). A papal peace mosaic, 1878-1936: Excerpts from the messages of Popes Leo XIII, Pius X, Benedict XV and Pius XI. The Paulist Press.
Lua i Stíl Chicago (17ú heag.)Catholic Church. Pope agus Mary Catherine Schaefer. A Papal Peace Mosaic, 1878-1936: Excerpts from the Messages of Popes Leo XIII, Pius X, Benedict XV and Pius XI. New York: The Paulist Press, 1936.
Lua MLA (8ú heag.)Catholic Church. Pope agus Mary Catherine Schaefer. A Papal Peace Mosaic, 1878-1936: Excerpts from the Messages of Popes Leo XIII, Pius X, Benedict XV and Pius XI. The Paulist Press, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.