Catholic Church. Pope (1922-1939 : Pius XI), Pius, X., & Treacy, G. C. (1930). Christian education of youth: Encyclical letter. Paulist Press.
Chicago-Zitierstil (17. Ausg.)Catholic Church. Pope (1922-1939 : Pius XI), XI Pius, und Gerald C. Treacy. Christian Education of Youth: Encyclical Letter. New York, N.Y.: Paulist Press, 1930.
MLA-Zitierstil (8. Ausg.)Catholic Church. Pope (1922-1939 : Pius XI), et al. Christian Education of Youth: Encyclical Letter. Paulist Press, 1930.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.