"Sedara, N." <br/><br/>
අලෙවිකරණය/ 
N.Sedara 
 - Kottawa:  "Saraa prakaashana,"  1998 
 - 130p. 
<br/><br/><label>Subjects--Index Terms: </label>marketing 
<br/><br/><label>Dewey Class. No.: </label>658  / SED