Jayawardena,H.V.G.S <br/><br/>
Aththa thiththayi viteka pudumayi -1 

 - Colombo  S. Godake & Brothers  2005 
 - 222 p ., 
<br/><br/> A Book on Social Scientist Research 
<br/><br/><label>ISBN: </label>9552089212 
<br/><br/><label>Dewey Class. No.: </label>294  / JAY