Çelik, Kazım, Osman Tayyar Çelik, and Ümit Kahraman. “Teachers’ Informal Learning in The Context of Development: Resources, Barriers, And Motivation”. Psycho-Educational Research Reviews 10, no. 2 (August 2, 2021): 77–91. Accessed May 2, 2024. https://perrjournal.com/index.php/perrjournal/article/view/63.