John Paul II, P. (1980). Christ tells youth how to be happy. Daughters of St. Paul.
Chicago-referens (17:e uppl.)John Paul II, Pope. Christ Tells Youth How to Be Happy. Boston, Mass.: Daughters of St. Paul, 1980.
MLA-referens (8:e uppl.)John Paul II, Pope. Christ Tells Youth How to Be Happy. Daughters of St. Paul, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.