1.
Sitthichokvorakarn V, Boonpheng T, Nuallaong W, Jitvaropas R. Happiness in Studying Sciences and Mathematics Program of Grade 11 Students at Suankularb Wittayalai School. APPJ [internet]. 2024 Oct. 22 [cited 2025 Dec. 9];40(3):57-66. available from: https://he01.tci-thaijo.org/index.php/APPJ/article/view/273385