Yoosung S, Sittitool T. Teacher’s Performance Based on to Professional Standards of Teachers Under the Office of Samut Prakan Provincial Primary Education Area 1. Ratchaphruek [internet]. 2020 Dec. 8 [cited 2026 Aug. 26];18(3):129-38. available from: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/241432