Elements of algebra : 
Stillwell, John. 
 - New York :  Springer-Verlag,  1994 
 - xi, 181 p. :  ill. ;  25 cm. 
 - Undergraduate texts in mathematics .
<br/><br/><label>ISBN: </label>0387942904 (New York : acid-free paper) | 3540942904 (Berlin : acid-free paper) :