SAAD, N. .; SANKARAN, S. . Development of teacher professionalism towards 21st century learning: Pembangunan profesionalisme guru ke arah pembelajaran abad ke-21. Academia Open, [S. l.], v. 3, p. 10.21070/acopen.3.2020.496, 2020. DOI: 10.21070/acopen.3.2020.496. Disponível em: https://acopen.umsida.ac.id/index.php/acopen/article/view/496. Acesso em: 21 sep. 2025.