Pacelli, Eugenio to Gasparri, Pietro from 10 July 1920, in: 'Kritische Online-Edition der Nuntiaturberichte Eugenio Pacellis (1917-1929)', document no. 5300, URL: www.pacelli-edition.de/en/Document/5300. Last access: 03-04-2025.Online since 14-01-2013.