EdwinaS., MaharaniE., KusumawatyY., YusriJ., and YusminiY. “Perception of Farmers of Communal and Individual Stalls Towards the Role of Extension on Integrated Farming in Pelalawan District”. Jurnal Penyuluhan, Vol. 15, no. 2, Oct. 2019, pp. 217-29, doi:10.25015/15201919248.