Tobing, E. B. H. L., and A. R. Nasution. “An Obligation To Manage Community Plantation (Plasma Plantation) From 20% Of The Plantation Company’s Land Area”. Jurnal Ekonomi, vol. 11, no. 03, Dec. 2022, pp. 1665-72, https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/956.