I want to use several lines of the song from the movie Ghostbusters in a local newsletter. What are the copyright laws on this?

It's infringement of copyright, so you'd need to get permission before you do: see here (though the copyright owners might be more merciful than they would be for a published book...)

http://www.guardian.co.uk/books/2010/may/01/blake-morrison-lyrics-copyright

Emma

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See also the Society of Authors Quick Guides to copyrights , and to permissions:

http://www.societyofauthors.org/guides-and-articles