College algebra and trigonometry / 
Leticia L. Castillo (and three others). 
 - Mandaluyong City :  National Book Store,  2008. 
 - 771 pages :  illustrations ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra and trigonometry.