|One of the final changes takes place in 2006, when the crest accrediting Real Madrid as the best Club of the 20th Century is added to the right side of the shirt|
|"The Global Economics of Sport"||Dongfeng Liu, Girish Ramchandani 2012|
London: Guardian News and Media.
|The UEFA Europa League evolved from the UEFA Cup, which itself was conceived by Switzerland's Ernst Thommen, along with Italy's Ottorino Barrasi and England's Sir Stanley Rous||25 de abril de 2016|
|Union of European Football Associations UEFA||epa08942536 A handout photo made available by the Royal Spanish Football Federation RFEF shows FC Barcelona's head coach Ronald Koeman L and Athletic Bilbao's head coach Marcelino Garcia as they pose on the eve of their Spanish Supercup final match at Cartuja stadium, Sevilla, southern Spain 16 January 2021|