Citazione APA

Leo XIII, P. C. C. P. (1891). Encyclical letter of Our Holy Father, by divine providence Pope Leo XIII on the condition of labor. Baltimore.

Stile di citazione Chicago

Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter of Our Holy Father, by Divine Providence Pope Leo XIII on the Condition of Labor. Baltimore, 1891.

Citazione MLA

Leo XIII, Pope; Catholic Church. Pope. Encyclical Letter of Our Holy Father, by Divine Providence Pope Leo XIII on the Condition of Labor. Baltimore, 1891.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.