Dissanayaka, D.M.S.H.; Karthigayini, S.; Lakmal, R.M.D.M.(Faculty of Social Sciences and Humanities Rajarata University of Sri Lanka, Mihintale, 2020-12)
Pathiraja, K.P.C.M.; Hettiarachchi, H.A.D.S.; Herath, H.M.S.A.K.; Thilakarathna, M.P.S.; Jayathissa, G.M.D.D.(Rajarata University of Sri Lanka, 2018-06-08)