Die Deutschen Trend Charts (July 17, 2009). "Die Deutschen Trend Charts". Trendcharts.de. Archived from the original on November 29, 2011. Retrieved February 23, 2011.
Die Deutschen Trend Charts (July 17, 2009). "Die Deutschen Trend Charts". Trendcharts.de. Archived from the original on November 29, 2011. Retrieved February 23, 2011.