Leo XIII, P. C. C. P. (1924). Encyclical Letter on the Condition of Labor. Brooklyn.
Čikaški stil citiranja (17. izdanje)Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter on the Condition of Labor. Brooklyn, 1924.
MLA način citiranja (8. izdanje)Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter on the Condition of Labor. Brooklyn, 1924.
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