Jayathilake, H.D.Y.D.; Edirisinghe, E.A.D.A.; Subramanian, K.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
VGunasekara, H.; Fernando, A.K.; Padmasika, T.; Muthugoda, N.S.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)