Leo XIII, P. (1889). Allocution of His Holiness Pope Leo XIII: Delivered in consistory, June 30th, 1889. S.l..
Παραπομπή σε μορφή Chicago (17η εκδ.)Leo XIII, Pope. Allocution of His Holiness Pope Leo XIII: Delivered in Consistory, June 30th, 1889. S.l., 1889.
Παραπομπή σε μορφή MLA (8th εκδ.)Leo XIII, Pope. Allocution of His Holiness Pope Leo XIII: Delivered in Consistory, June 30th, 1889. S.l., 1889.
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