website|http://www.nintendoage.com/forum/messageview.cfm?catid=6&threadid=33781|DreamTR's Nintendo Age sales thread|
website|http://s73.photobucket.com/albums/i217/DreamTR/?action=view&current=021.jpg|DreamTR's Photobucket page showing a picture of the prototype|
website|http://www.digitpress.com/forum/showthread.php?121546-Super-Mario-Kart-prototype|Thread on Digital Press, where DreamTR states he aquired this prototype|