Wijesekara, U.A.D.S.L.; Kottearachchi, N.S.; Dahanayaka, B.A.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Madhushani, R.D.T.D.; Athauda, A.M.T.P.; Wijeyewardena, H.M.S.L.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
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)
Tennakoon, W.D.N.S.M.; Arachchi, R.S.S.W.(Department of Business Management, Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2010)