From Wikimedia Incubator

This template encapsulates the <references /> tag to show the list of references defined by <ref>...</ref> tags, with some formatting. It reduces the font size and has options for columns and groups. References can be defined within the body of the article or within the reference list.

The <ref>...</ref> and <references /> tags are part of the Cite.php MediaWiki extension.

{{Reflist}} may be used with {{Wn/syl/Refbegin}} and {{Wn/syl/Refend}} to format different styles of references.