Editing Help:Citation Style 1 (section)

====Online sources====
{{Main|Wikipedia:External links|Wikipedia:Citing sources}}

Links to sources are regarded as conveniences and are not required, except when citing Web-only sources. There are many digital libraries with works that may be used as sources.
* Links should be to full versions of the source.
* Online sources that require payment or subscription may be included per [[Wikipedia:Verifiability]].

Do not link to:
* Sites that do not have permission to republish the work or that otherwise violate copyright.
* Commercial sites such as Amazon, unless no alternative exists.
* Reviews of the work.
* Very short extracts such as Google Books snippet view where there is not enough context to verify the content, unless the entire work is also freely available there. (See [[WP:BOOKLINKS]])