Google ニュース
1 2 Helft, Miguel. “How a Series of Mistakes Hurt Shares of United”. New York Times (The New York Times Company). http://www.nytimes.com/2008/09/15/technology/15google.html 2008年9月15日閲覧。
↑ Kee, Tameka (2009-06-09), “Google tests Wikipedia links with news? But what about credibility issues?”, The Washington Post, http://www.washingtonpost.com/wp-dyn/content/article/2009/06/09/AR2009060902850.html .
↑ Shaer, Matthew (2009-06-12), “Google News now linking to Wikipedia – a recipe for disaster?”, The Christian Science Monitor, http://features.csmonitor.com/innovation/2009/06/12/google-news-now-linking-to-wikipedia-%E2%80%93-a-recipe-for-disaster/ .