Pius X, P. (1903). The First Encyclical Letter of Our Holy Father, Pope Pius X. New York.
Chicago Style (17th ed.) CitationPius X, Pope. The First Encyclical Letter of Our Holy Father, Pope Pius X. New York, 1903.
MLA (8th ed.) CitationPius X, Pope. The First Encyclical Letter of Our Holy Father, Pope Pius X. New York, 1903.
Warning: These citations may not always be 100% accurate.