Catholic Church. Pope (1963-1978 : Paul VI). (1967). On the development of peoples: Populorum progressio. Our Sunday Visitor.
Lua i Stíl Chicago (17ú heag.)Catholic Church. Pope (1963-1978 : Paul VI). On the Development of Peoples: Populorum Progressio. Huntington, Ind.: Our Sunday Visitor, 1967.
Lua MLA (8ú heag.)Catholic Church. Pope (1963-1978 : Paul VI). On the Development of Peoples: Populorum Progressio. Our Sunday Visitor, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.