User:EmilJ, Wikimedia Commons, 8/9-2008
http://commons.wikimedia.org/wiki/File:Flag_of_the_United_Kingdom.svg
http://commons.wikimedia.org/wiki/File:Flag_of_the_United_Kingdom.svg
User:Ektor, flickr, 23/8-2009
http://www.flickr.com/photos/atardecerboricua/3857853340/in/photostream/
http://www.flickr.com/photos/atardecerboricua/3857853340/in/photostream/
User:ZenOracle, deviantART, 21/2-2012
http://zenoracle.deviantart.com/art/Books-Clip-Art-286377887
http://zenoracle.deviantart.com/art/Books-Clip-Art-286377887
User:randy stewart, flickr, 15/1-2008
http://www.flickr.com/photos/stewtopia/2195632183/
http://www.flickr.com/photos/stewtopia/2195632183/