Copy/Paste Attribution Plug In

I am trying to identify a plug in that allows a visitor to cut from a post and paste it wherever. But, when they paste it, there is an attribution line that has the original URL and some wording.

This appendage is editable (or deletable) but it does make someone think twice about taking or quoting your content without attribution.

Does anyone know the name (or some good search terms to use to find) this plug in?

To see what I am trying to explain, go here. And then highlight a word/sentence/paragraph from the post and copy it. Then past it in either anew post/email/Word Doc.

Thanks
John