journal journal. PDF STUDI TENTANG KOPERASI PERKEBUNAN KELAPA SAWIT RAKYAT BERPRESTASI DI INDONESIA Study of the Achievement Cooperative on Smallholder Oil Palm Plantation in Indonesia: Suharno, Yuprin A.D dan Trisna Anggreini. aev [Internet]. 2019 Sep. 23 [cited 2024 Jul. 22];11(02):33-9. Available from: https://e-journal.upr.ac.id/index.php/aev/article/view/120