Abstract algebra:  (modern algebra)/ 
Sergio E. Ymas. 
 - Manila:  Ymas Publishing;  2012. 
 - 321 pages:  illustrations;  26 cm. 
<br/><br/><label>ISBN: </label>9789710438049 
<br/><br/><label>LC Class. No.: </label>QA 162  / .Y52 2012