Leo XIII, P. (1889). Allocution of Our Most Holy Father, Pope Leo XIII: Delivered in consistory on the 30th of June, 1889. London?.
Chicago-referens (17:e uppl.)Leo XIII, Pope. Allocution of Our Most Holy Father, Pope Leo XIII: Delivered in Consistory on the 30th of June, 1889. London?, 1889.
MLA-referens (8:e uppl.)Leo XIII, Pope. Allocution of Our Most Holy Father, Pope Leo XIII: Delivered in Consistory on the 30th of June, 1889. London?, 1889.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.