Leo XIII, P. (1878). The great pastoral letters of Cardinal Pecci (now Pope Leo XIII) on the church and civilization. New York.
Chicago-Zitierstil (17. Ausg.)Leo XIII, Pope. The Great Pastoral Letters of Cardinal Pecci (now Pope Leo XIII) on the Church and Civilization. New York, 1878.
MLA-Zitierstil (8. Ausg.)Leo XIII, Pope. The Great Pastoral Letters of Cardinal Pecci (now Pope Leo XIII) on the Church and Civilization. New York, 1878.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.