«Hilversum in actie voor 70 minuten Eurovisie». Nieuwe Leidsche Courant (på nederlandsk). Historische Kranten, Erfgoed Leiden en Omstreken. 10. mars 1958. s. 5. Besøkt 6. desember 2022.
«Eurovision Song Contest 1958 (Hilversum)». The Eurovision Times. Besøkt 23. april 2017. «in certain countries, Italy’s performance had not been heard in all participating countries and that thus Modugno had to perform his song again.»