Agusra, Diko, et al. “Effect of Motivation and Job Satisfaction on Work Productivity of Oil Palm Plantation Employees PT. Four Mighty Agro Lawang in Four Lawang District”. Jurnal Ekonomi, Manajemen, Akuntansi Dan Keuangan, vol. 3, no. 1, Jan. 2022, pp. 48 – 56, doi:10.53697/emak.v3i1.372.