Kongkird, S., S.-Y. Fang, P. Songsanandr, and S. Rodsomboon. “Product Development and Upgrading Marketing Potential of Degraded Longan to Commerce in Lamphun Province”. Ph.D. in Social Sciences Journal, vol. 16, no. 1, Apr. 2026, p. e278258, https://so05.tci-thaijo.org/index.php/phdssj/article/view/278258.