Using CiteGenie, you can "automagically copy text with correct citations from Westlaw, Lexis, and other websites."
Here's how the author describes the free program, which plugs into your browser--
Cutting and pasting when doing legal research using your browser is simple. But having to construct the citation for what you pasted is not so simple. This is especially true with legal citations from sources like Westlaw. You have to stop and copy the case name separately, determine the pinpoint page numbers, and adjust the date and court name format.
So I decided to write a browser plugin that would automatically add a pinpoint citation to the text I copy and paste. Thus CiteGenie was born.
If something like this interests you, just surf to the website and try it for yourself.
Source: "Achieve total recall with online tools," by Catherine Sanders Reach, Trial Magazine, January 2009.