Subasinghe, S.A.M.S.; Abeynayake, N.R.; Shyamale, H.W.; Wellala, N.N.K.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2013)
Pathirawasam, C.; Weerakoonbanda, Y.K.(Department of Business Management, Faculty of Business Studies and Finance, Wayamba University of Sri Lanka. Kuliyapitiya, 2010)
Dassanayake, H.P.C.M.; Ranawana, S.S.E.; Abeynayake, N.R.(Faculty of Agriculture and Plantation Management, Wayamba University of Sri Lanka, Makandura, 2005)
Dulshani, L.A.M.N.; Ranaweera, B.; Karunarathne, K.H.M.I.(Faculty of Agriculture and Plantation Management,Wayamba University of Sri Lanka, Makandura, 2016)