Boonchu D, Nimbute S. Positive Psychology Program to Enhance Students’ Social Adjustment in a Transition from Primary to Secondary Grades. Ratchaphruek [internet]. 2023 Aug. 17 [cited 2026 Sep. 11];21(2):32-48. available from: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/265537