Rudi Hartono. The Economic Impact Of The Presence Of Oil Palm Plantations Towards ISPO Certification: Case Study Of Jaya Usaha Sempurna Producer Cooperative In Mega Timur Village. IJMEBE [Internet]. 2025 Jan. 4 [cited 2026 Apr. 21];3(2):66-9. Available from: https://putrapublisher.org/ojs/index.php/jamis/article/view/737