Leo XIII, P. C. C. P. (1924). Encyclical Letter on the Condition of Labor. Brooklyn.
Lua i Stíl Chicago (17ú heag.)Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter on the Condition of Labor. Brooklyn, 1924.
Lua MLA (8ú heag.)Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter on the Condition of Labor. Brooklyn, 1924.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.