Sutapat Kongkird และผู้แต่งคนอื่นๆ. (2026) Product Development and Upgrading Marketing Potential of Degraded Longan to Commerce in Lamphun Province. <i>Ph.D. in Social Sciences Journal</i>, <i>16</i>(1), e278258.Sutapat Kongkird และผู้แต่งคนอื่นๆ. "Product Development and Upgrading Marketing Potential of Degraded Longan to Commerce in Lamphun Province". Ph.D. in Social Sciences Journal 16 (2026):e278258.Sutapat Kongkird และผู้แต่งคนอื่นๆ. Product Development and Upgrading Marketing Potential of Degraded Longan to Commerce in Lamphun Province. Doctor of Philosophy in Social Sciences Association Ramkhamhaeng University:ม.ป.ท. 2026.