Athukorala, Daya Rohana සාර්ථකත්ව කුසලතා = saarTHakathva kusalathaa: pudgala paurusa sanvarDhanaya sadahaa - Panadura; Siksha Mandira Publishers, 2015. - 203p. 21cm ISBN: 955-9008-88-9 Subjects--Topical Terms: Personal ImprovementApplied Psychology Dewey Class. No.: 158.1 / ATH