Arulrajah, A.A.; Opatha, H.H.D.N.P.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2012)
Sajeewanie, T. L.; Opatha, H.H.D.N.P.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2007)
Serasinghe, D. K. S.; Opatha, H.H.D.N.P.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2007)
Ramawickrama, J.; Opatha, H.H.D.N.P.; Pushpakumari, M.D.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2018)
Iddagoda, Y.A.; Opatha, H.H.D.N.P.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2017)
Opatha, H.H.D.N.P.; Perera, H.(Department of Human Resource Management Faculty of Management Studies and Commerce University of Sri Jayewardenepura, 2017)