Cita APA (7a ed.)

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.

Cita Chicago Style (17a ed.)

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.

Cita MLA (8a ed.)

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.