Yoosung, S., & 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), 129–138. retrieved from https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/241432