Opatha, H.H.D.N.P.; Perera, H.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2017)
Opatha, H.H.D.N.P.; Rathnayake, S.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2018)
Sirirwardane, M.S.P.M.; Samanmali, M.A.D.; Rathnayake, R.N.P.(Department of Forestry and Environmental Science University of Sri Jayewardenepura, 2015)