Dyfyniad APA

Leo XIII, P. C. C. P. (19). Rerum Novarum- Encyclical Letter of Pope Leo XIII on The Condition of Labor. New York.

Dyfyniad Arddull Chicago

Leo XIII, Pope; Catholic Church. Pope. Rerum Novarum- Encyclical Letter of Pope Leo XIII on The Condition of Labor. New York, 19.

Dyfyniad MLA

Leo XIII, Pope; Catholic Church. Pope. Rerum Novarum- Encyclical Letter of Pope Leo XIII on The Condition of Labor. New York, 19.

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