Helm.„Wikipedia: "A Work in Progress"“. BusinessWeek Online. Bloomberg Businessweek (2005-yil 13-dekabr). 2015-yil 11-aprelda asl nusxadan arxivlangan. Qaraldi: 2013-yil 16-oktyabr.
Helm.„Wikipedia: "A Work in Progress"“. BusinessWeek Online. Bloomberg Businessweek (2005-yil 13-dekabr). 2015-yil 11-aprelda asl nusxadan arxivlangan. Qaraldi: 2013-yil 16-oktyabr.