Yoosung, Sukanda, and Thairath Sittitool. “Teacher’s Performance Based on to Professional Standards of Teachers Under the Office of Samut Prakan Provincial Primary Education Area 1”. Ratchaphruek Journal 18, no. 3 (December 8, 2020): 129–138. accessed August 26, 2026. https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/241432.