กล่ำสกุล โสภาพร, and ศรีสอาด คงขวัญ. 2018. “Employing Local Wisdom to Commercial Product Development: A Case Study of Phetchaburi Palmyra Plam Juice”. Journal of Management Science Chiangrai Rajabhat University 12 (1):191-213. https://so03.tci-thaijo.org/index.php/jmscrru/article/view/119883.