Sari, Fifian, and Munajat Munajat. “Determination of Rubber Farmers Selling Bokar to Middlemen Around Factory in OKU Regency South Sumatera Province”. MBIA 21, no. 3 (January 7, 2023): 299–309. Accessed November 29, 2024. https://journal.binadarma.ac.id/index.php/mbia/article/view/2018.