Paul J. Hopper and Elizabeth Closs Traugott <br/><br/>
Grammaticalization  Cambridge Textbooks in Linguistics 

 - Cambridge, New York, Melbourne, Madrid  Cambridge University Press  1993 
<br/><br/><label>ISBN: </label>978-0-521-80421-9 
<br/><br/><label>Dewey Class. No.: </label>410HOPG