คุ้มราษฎร์ ส. “Attach Certificate of Origin, utilizing FTA privilege: Case Study: Thailand’s gems and jewelry Industry under ASEAN Trade in Goods Agreement (ATIGA)”. Business Administration and Management Journal Review, vol. 10, no. 2, Dec. 2018, pp. 281-98, https://so01.tci-thaijo.org/index.php/bahcuojs/article/view/162359.