John Paul II, P. (1980). Christ tells youth how to be happy. Daughters of St. Paul.
Lua i Stíl Chicago (17ú heag.)John Paul II, Pope. Christ Tells Youth How to Be Happy. Boston, Mass.: Daughters of St. Paul, 1980.
Lua MLA (8ú heag.)John Paul II, Pope. Christ Tells Youth How to Be Happy. Daughters of St. Paul, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.