Kaushalya, P.M.K.T.; Yapa, P.I.; Weeraratne, W.M.J.(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)