Analysis of information sources in references of the Wikipedia article "Quả bóng vàng FIFA 2011" in Vietnamese language version.
|https://web.archive.org/web/20121107005712/http://www.fifa.com/ballondor/archive/edition= (trợ giúp)|= (trợ giúp)|https://web.archive.org/web/20121107005712/http://www.fifa.com/ballondor/archive/edition= (trợ giúp)|= (trợ giúp)