Ostin, A., T. E. Suswatiningsih, and A. Ferhat. “Peranan Tengkulak Terhadap Pemasaran Petani Kelapa Sawit Di Desa Nagasari Kabupaten Muara Jambi: The Role of Middlemen in the Marketing of Palm Oil by Farmers in Nagasari Village, Muara Jambi Regency”. AGRIFITIA : Journal of Agribusiness Plantation, vol. 6, no. 2, Sept. 2026, pp. 149-67, doi:10.55180/aft.v6i2.1988.