Samarakoon, S.M.R.K.; Kumara, U.E.S.; Gunarathne, U.G.V.D.D.(Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2014)
Nanayakkara, K.G.M.; Wijetunge, W.A.D.S.(Department of Business Management, Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2010)