Sahabagithwa puhunu athpotha 

 - Colombo  Sri Lanka Foundation Institute  1994 
 - 232 p ., 
<br/><br/> A book on Participant's Manual 
<br/><br/><label>ISBN: </label>9555920079 
<br/><br/><label>Dewey Class. No.: </label>658  / SRI