Pyles, Thomas y Algeo, John.  <br/><br/>
The origins and development of the english language 

 - 3a ed. 
 -  1992 
<br/><br/><label>ISBN: </label>0-15-567608-3 
<br/><br/><label>Dewey Class. No.: </label>420.9 P9O7 1987