Dissanayake, A.; VArachchige, O.; Ramanaka, A.R.N.D.; Dissanayake, N.B.; Dissanayake, N.B.; Kumari, H.V.M.; Pitigala, P.K.G.C.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Ramanaka, A.R.N.D.; Semasinghe, W.M.; Wehigaldeniya, W.G.D.S.; Oshani, P.A.L.; Dilshani, P.Y.H.; Dissanayake, N.B.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Ramanaka, A.R.N.D.; Bandara, K.A.W.P.; Wehigaldeniya, W.G.D.S.; Oshani, P.A.L.; Dilshani, P.Y.H.; Jayantha, K.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)