BP:REFB

The source editor shows underlying wiki markup like [[Earth]]. The VisualEditor works like a word processor.

One of the key policies of Wikipedia is that all article content has to be verifiable. This means that reliable sources must be able to support the material. All quotations, any material whose verifiability has been challenged or is likely to be challenged, and contentious material (whether negative, positive, or neutral) about living persons must include an inline citation to a source that directly supports the material. This also means that Wikipedia is not the place for original work, archival findings that have not been published, or evidence from any source that has not been published.

If you are adding new content, it is your responsibility to add sourcing information along with it. Material provided without a source is significantly more likely to be removed from an article. Sometimes such material will be tagged first with a "citation needed" template to give editors time to find and add sources before it is removed, but often editors will simply remove it because they question its veracity.

This tutorial will show you how to add inline citations to articles, and also briefly explain what Wikipedia considers to be a reliable source.

Inline citations

Inline citations are usually small, numbered footnotes like this. They are generally added either directly following the fact that they support, or at the end of the sentence that they support, following any punctuation. When clicked, they take the reader to a citation in a reference section near the bottom of the article.

While editing a page that uses the most common footnote style, you will see inline citations displayed between <ref>...</ref> tags.

If you are creating a new page, or adding references to a page that didn't previously have any, remember to add a References section like the one below near the end of the article:

==References==
{{reflist}}

RefToolbar