Vitharana, S.; Sumedha, K.; Jayaweera, S.; Manuratne, P.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Suraweera, S.A.D.H.N.; Liew, C.L.; Cranefield, J.(Research Centre for Social Sciences, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)