Hernstein, I. N <br/><br/>
Abstract algebra. 3rd. Edition. 

 - New Jersey  John Wiley & Sons  1995 
 -  xv, 249p. 
<br/><br/><label>ISBN: </label>978-0-471-36879-3 
<br/><br/><label>Dewey Class. No.: </label>512.5 HER