Jangruxsakul, Sirat, Jakkadul Wangkangvansot, Kultiwa So-Ngern, and Pongsai Petcharuk. 2026. “Quality Improvement of Red Tea Products by the Koh Kret Tea Community Enterprise to Enhance Market Competitiveness”. SOCIAL SCIENCES RESEARCH AND ACADEMIC JOURNAL 21 (1). Bangkok, Thailand:61-76. https://so05.tci-thaijo.org/index.php/JSSRA/article/view/283412.