Források:
- https://en.wikipedia.org/wiki/The_Beatles%27_rooftop_concert
- https://www.mojo4music.com/articles/11595/20-things-need-know-beatles-rooftop-concert
- https://www.rollingstone.com/music/news/beatles-famous-rooftop-concert-15-things-you-didnt-know-20160129
- http://mentalfloss.com/article/74607/10-facts-about-beatles-final-rooftop-show
- https://www.statisticbrain.com/the-beatles-total-album-sales/