"Yee, Lee Peng" <br/><br/>
New Syllabus Maths Workbook -1 (5th Ed.) 

 - Karachi  Oxford Universty Press  2003 
 - 148 
<br/><br/><label>ISBN: </label>0195799313 
<br/><br/><label>Dewey Class. No.: </label>510  / T380