ภักดี น, ขลิบทอง จ, ตุ้มหิรัญ เ. Extension for Participation Operations of members Palm Oil Collaborative Farmers  in Meuang Phang Nga District Phang Nga Province. BMV15. 2025;15(6):253-273. Accessed August 12, 2026. https://benjamit.thonburi-u.ac.th/ojs/index.php/bmv15/article/view/268