Nirunrat Singtana, Ngamlamai Piolueang. Locus of Control, Social Support, Self - Determination, and Self - Directed Learning of Students at Kasetsart University, Bangkhen Campus. GS KKU HS [internet]. 2021 Apr. 30 [cited 2026 Sep. 29];9(1):35-46. available from: https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/225890