Wikipedia:Articles with a single source

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According to Wikipedia's general notability guideline, a topic is presumed to be notable if it has received significant coverage in reliable secondary sources that are independent of the subject.

Following this guideline, a subject for which only one source can be cited is unlikely to merit a standalone article. (Remember: Notability is concerned with whether sufficient sources exist, not merely how many have already been cited in the current version of the article.)

There are other problems inherent to an article containing a single source.

Any such articles that are not copyright violations (for example, because the infringed source is in the public domain) may still constitute plagiarism.
  • Original research: Information in a single-sourced article beyond what is drawn from its lone source is likely original research – facts and ideas not already published by reliable sources.
  • Dictionary definitions: Wikipedia is not a dictionary. Under no circumstances can an article be supported solely by a dictionary entry.

Lone source published by the article's subject[edit]

Shortcut:

Some of the least permissible articles are those whose lone source cited is published by the article's subject. This constitutes a conflict of interest. Any company, organization, group, or individual interest has the ability to publish promotional material about itself. Such self-published sources do not demonstrate that people independent of the subject consider it notable enough to be worthy of attention. Therefore, self-published sources cannot be used to establish notability. In some cases, information may be taken from a self-published source after notability has been established.

An article that relies entirely on information from the subject itself should be deleted, possibly under speedy deletion criteria G11.

Tagging problematic articles[edit]

The template {{onesource}} can be added to the top of articles with one source. For sections, the template {{onesource|section}} can be added.