Jayatunge, Ruwan M. ප්රතිකාරාත්මක උපදේශනය = prathikaaraathmaka upadeeSHanaya - Mulleriyawa: Wijesoriya Garnta Kendraya, 2003. - 112p. 21cm ISBN: 9556520318 Subjects--Topical Terms: Psychology Dewey Class. No.: 150 / JAY