Herath, H.M.A.; Atugoda, S.(Department of Business Management, Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2010)
Dananjaya, M.H.; Herath, H.M.I.K.; Gajanayake, B.; Wijebandara, D.M.D.I.; Pathirana, K.P.A.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)
Dasanayake, D.M.C.S.; Ikram, S.M.M.; Mudalige, Jayasinghe U.K.; Edirisinghe, J.C.; Udugama, J.M.M.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)