Budapest Cup. thecelticwiki.com. ციტირების თარიღი: 15 აგვისტო, 2020.
Empire Exhibition Cup. thecelticwiki.com. ციტატა: „The history of Celtic is laced with both moments of supreme triumph and wry irony. But seldom have both factors combined with such pleasing effect as they did in the summer of 1938.“ ციტირების თარიღი: 15 აგვისტო, 2020.
Coronation Cup. thecelticwiki.com. ციტატა: „The Coronation Cup was a one-off football tournament to celebrate the coronation of Queen Elizabeth II in 1953 between four English and four Scottish clubs held in Glasgow in May 1953. The eight teams that took part were Aberdeen, Celtic, Hibernian and Rangers from Scotland and Arsenal, Manchester United, Newcastle United and Tottenham Hotspur represented England This tournament, like the Empire Exhibition Trophy was held in very high regard at the time as it gave teams the opportunity to test themselves against teams from other countries in the days before European football.“ ციტირების თარიღი: 15 აგვისტო, 2020.
