"Gran Turismo in the Sky" (in German). eXtreme-players.de. August 25, 2009. Archived from the original on August 29, 2009. Retrieved August 26, 2009. (in German)
"Gran Turismo in the Sky" (in German). eXtreme-players.de. August 25, 2009. Archived from the original on August 29, 2009. Retrieved August 26, 2009. (in German)