Larson,Ron. <br/><br/>
Algebra and Trigonometry Towson University Edition MATH 115 / 
Ron Larson. 
 - 6th ED. 
 - USA:  CENGAGE Learning,  2011. 
 - 542 P. ; A142 Index Inc. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>512.13  / LAR