Marianus Piter Son, Yarnest, Fajar Supanto. The Effect of Education Level, Work Environment and Teacher Professional Competency Development on the Performance of Teachers . IJASRE [Internet]. 2020 Jun. 25 [cited 2024 Apr. 26];6(6):96-105. Available from: https://ijasre.net/index.php/ijasre/article/view/1014