"Brunero vince il IX "Giro d'Italia"" [Brunero wins the 9th "Tour of Italy"]. La Stampa (in Italian). Editrice La Stampa. 13 June 1921. p. 4. Retrieved 27 May 2012.
bikeraceinfo.com
Bill and Carol McGann. "1921 Giro d'Italia". Bike Race Info. Dog Ear Publishing. Retrieved 2012-07-10.
coninet.it
dlib.coninet.it
"I vincitori delle categorie speciali" [The winners of the special categories]. Corriere dello Sport (in Italian). 14 June 1950. p. 6. Archived from the original on 22 December 2014. Retrieved 7 July 2013.
web.archive.org
"I vincitori delle categorie speciali" [The winners of the special categories]. Corriere dello Sport (in Italian). 14 June 1950. p. 6. Archived from the original on 22 December 2014. Retrieved 7 July 2013.