Laavanya, M.; Sadeera, S.D.H.; Premachandra, W.M.C.M.; Priyangani, T.R.A.; Dahanaka, D.R.N.S.; Josepha, J.; Karthijekan, K.; Kartheepan, K.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Jayawardana, Y.W.; Madhubhashini, A.A.P.M.; Madhushani, P.A.G.; Marapana, M.B.M.R.C.S.(Department of Economics, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)