Karunathilake, N.M.B.P.K.; Thilakarathne, G.G.T.M.; Thilakarathna, D.D.M.(Faculty of Humanities and Social Sciences, University of Ruhuna, Matara, Sri Lanka ., 2019-09-27)
Rajanayake, R.M.C.P.K.; Karunathilake, N.M.B.P.K.; Hewawasam, S.S.(Faculty of Humanities and Social Sciences, University of Ruhuna, Matara, Sri Lanka ., 2019-09-27)