APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

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