Gamlath, W.G.P.; Thusithakumari, W.M.; Malkanthi, D.G.A.S.; Jayawardana, K.G.I.(Department of Library and Information Science, Faculty of Social Sciences, University of Kelaniya, Sri Lanka, 2016)
Thusithakumari, W.M.; Jayawardana, K.G.I.(Department of Library and Information Science, Faculty of Social Sciences, University of Kelaniya,Sri Lanka., 2017)