Putra, Christian Pratama, Dwi Sadono, and Djoko Susanto. “Perceptions of Smallholders Farmers on Oil Palm Plantation Cooperative in Kongbeng, East Kutai”. Jurnal Penyuluhan 16, no. 1 (April 12, 2020): 134–146. Accessed December 24, 2025. https://journal.ipb.ac.id/jupe/article/view/28295.