Gladstone, W. E. (1875). Speeches of Pope Pius IX. New York.
Lua i Stíl Chicago (17ú heag.)Gladstone, W. E. Speeches of Pope Pius IX. New York, 1875.
Lua MLA (8ú heag.)Gladstone, W. E. Speeches of Pope Pius IX. New York, 1875.
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