APA (7th ed.) Citation

Pius X, P. (1904). The XIII Centenary of St. Gregory, Encyclical Letter of Pius X. New York.

Chicago Style (17th ed.) Citation

Pius X, Pope. The XIII Centenary of St. Gregory, Encyclical Letter of Pius X. New York, 1904.

MLA (8th ed.) Citation

Pius X, Pope. The XIII Centenary of St. Gregory, Encyclical Letter of Pius X. New York, 1904.

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