Pius IX, P. (1865). The Encyclical Letter of His Holiness, Pius IX, together with the Syllabus of Errors Condemned, to which is added the brief, "Arcano Divinae Providentiae" of 1846. Argus Company.
Cytowanie według stylu Chicago (wyd. 17)Pius IX, Pope. The Encyclical Letter of His Holiness, Pius IX, Together with the Syllabus of Errors Condemned, to Which Is Added the Brief, "Arcano Divinae Providentiae" of 1846. Albany: Argus Company, 1865.
Cytowanie według stylu MLA (wyd. 8)Pius IX, Pope. The Encyclical Letter of His Holiness, Pius IX, Together with the Syllabus of Errors Condemned, to Which Is Added the Brief, "Arcano Divinae Providentiae" of 1846. Argus Company, 1865.
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