Template:Source content
From Pittsburgh Streets
The {{source content}} template is used to include the content of a source on the source page.
At the end of the source page, add the following snippet:
<noinclude>{{source content}}</noinclude>
For a newly created source, this will create a redlink pointing to the content subpage, which you can then edit.
Sources that use {{source content}} will be added to Category:Sources with content.