Waitley, Denis <br/><br/>
වැඩ කිරීමේ සතුට  The Joy of Working 

 - Mulleriyawa  Wijesooriya  Grantha Kendraya  2001 
 - 260p. 
<br/><br/><label>ISBN: </label>9556521119 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied psychology
<br/><br/><label>Dewey Class. No.: </label>158  / GUN