College algebra (worktext) / 
Norma C. Moralla 
 - Meycauayan, Bulacan :  Trinitas Publishing Incorporated,  c2005. 
 - 173 pages ;  25 cm. 
<br/><br/> Bibliography: page 167.  Includes index. 
<br/><br/><label>ISBN: </label>9714206073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra.