"John Charles honoured". Leeds United Football Club (official website). 2006. Archived from the original on 29 September 2007. Retrieved 10 August 2006.
national-football-teams.com
Strack-Zimmermann, Benjamin. "John Charles". www.national-football-teams.com. Retrieved 1 September 2021.
Roberto Di Maggio; Igor Kramarsic; Alberto Novello (11 June 2015). "Italy – Serie A Top Scorers". RSSSF. Archived from the original on 31 October 2015. Retrieved 2 December 2015.
"John Charles honoured". Leeds United Football Club (official website). 2006. Archived from the original on 29 September 2007. Retrieved 10 August 2006.
Roberto Di Maggio; Igor Kramarsic; Alberto Novello (11 June 2015). "Italy – Serie A Top Scorers". RSSSF. Archived from the original on 31 October 2015. Retrieved 2 December 2015.