"[Citation needed]" is a tag added by Wikipedia editors to unsourced statements in articles requesting citations to be added. The phrase is reflective of the policies of verifiability and no original research in Wikipedia and has become a general Internet meme. On the English Wikipedia, the display effect looks like this: 
Usage in Wikipedia
By Wikipedia policy, editors should add citations for content, to ensure accuracy and neutrality, and to avoid original research.
Usage outside Wikipedia
In 2008, Matt Mechtley created stickers with "", encouraging people to stick them on advertisements.
In 2010, American television hosts Jon Stewart and Stephen Colbert led the Rally to Restore Sanity and/or Fear at the National Mall in Washington, D.C. Some participants held placards with "".
- 栗岡 幹英 [Masahide Kurioka] (2010-03-01). "インターネットは言論の公共圏たりうるか：ブログとウィキペディアの内容分析" [Can the Internet be the Public Sphere of Discourse? : Contents Analysis of Blog and Wikipedia]. 奈良女子大学社会学論集 [Nara Women's University Sociological Studies] (in 日本語). 奈良女子大学社会学研究会 [Nara Women's University Sociological Study Group] (17): 133–151. ISSN 1340-4032.
- Joshua Glenn (2008-01-02). "". Boston.com. Archived from the original on 2018-07-27. Retrieved 2018-07-27. Unknown parameter
- Ted Johnson (2010-11-01). "Satirical rally calls for sanity and/or fear". Variety. Archived from the original on 2010-11-16. Retrieved 2018-07-27.
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