Yoosung, S. and Sittitool, T. (2020) “Teacher’s Performance Based on to Professional Standards of Teachers Under the Office of Samut Prakan Provincial Primary Education Area 1”, Ratchaphruek Journal, 18(3), pp. 129–138. available at: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/241432 (accessed: 28 August 2026).