Algebra and trigonometry / 
Sobel, Max A.; Lerner, Norbert  
 - 5th ed. 
 - Singapore :  Pearson Education South Asia Pte Ltd.,  2004. 
 - xiii, v.p.: ill.; 25 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9814024600 
<br/><br/><label>Dewey Class. No.: </label>Fil 512 So677 2004