ท่าสอน อาเฟนดี, and กาญจนะ ระพี. 2014. “A Risk Analysis of Supply Chain Ribbed Unsmoked Natural Rubber Sheet : Case Study of the Province of Narathiwat”. Journal of Engineering, RMUTT 1 (June):35-41. https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242074.