สังข์ศรี ส. A Model of Educational Services to Enable Graduate Students of Sukhothai Thammathirat Open University to Achieve Learning Success in the Distance Education System. edjour_stou [internet]. 2018 May 13 [cited 2026 Oct. 14];10(2):65-78. available from: https://so05.tci-thaijo.org/index.php/edjour_stou/article/view/124401